{"id":16561,"date":"2020-12-28T13:11:46","date_gmt":"2020-12-28T20:11:46","guid":{"rendered":"https:\/\/learnlibre.com\/?page_id=16561"},"modified":"2025-05-27T10:03:20","modified_gmt":"2025-05-27T16:03:20","slug":"lessons","status":"publish","type":"page","link":"https:\/\/learnlibre.com\/es\/lessons\/","title":{"rendered":"Lecciones"},"content":{"rendered":"<style>.kb-row-layout-id16561_f74f04-fe > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id16561_f74f04-fe > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id16561_f74f04-fe > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-md, 2rem);max-width:600px;margin-left:auto;margin-right:auto;padding-top:80px;padding-right:0px;padding-bottom:80px;padding-left:0px;grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id16561_f74f04-fe{background-color:#5533e9;}.kb-row-layout-id16561_f74f04-fe > .kt-row-layout-overlay{opacity:0.70;}@media all and (max-width: 1024px){.kb-row-layout-id16561_f74f04-fe > .kt-row-column-wrap{padding-top:80px;padding-right:0px;padding-bottom:80px;padding-left:0px;grid-template-columns:minmax(0, 1fr);}}@media all and (max-width: 767px){.kb-row-layout-id16561_f74f04-fe > .kt-row-column-wrap{padding-top:60px;padding-right:20px;padding-bottom:60px;padding-left:20px;grid-template-columns:minmax(0, 1fr);}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id16561_f74f04-fe alignnone kt-row-has-bg wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-1-columns kt-row-layout-equal kt-tab-layout-inherit kt-mobile-layout-row kt-row-valign-top\">\n<style>.kadence-column16561_d77af0-9f > .kt-inside-inner-col{padding-top:10px;padding-right:10px;padding-bottom:10px;padding-left:10px;}.kadence-column16561_d77af0-9f > .kt-inside-inner-col,.kadence-column16561_d77af0-9f > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column16561_d77af0-9f > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column16561_d77af0-9f > .kt-inside-inner-col{flex-direction:column;}.kadence-column16561_d77af0-9f > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column16561_d77af0-9f > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column16561_d77af0-9f{position:relative;}@media all and (max-width: 1024px){.kadence-column16561_d77af0-9f > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column16561_d77af0-9f > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column16561_d77af0-9f inner-column-1\"><div class=\"kt-inside-inner-col\"><style>.wp-block-kadence-advancedheading.kt-adv-heading16561_f28130-52, .wp-block-kadence-advancedheading.kt-adv-heading16561_f28130-52[data-kb-block=\"kb-adv-heading16561_f28130-52\"]{margin-bottom:22.5px;text-align:center;line-height:1.2em;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading16561_f28130-52 mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading16561_f28130-52[data-kb-block=\"kb-adv-heading16561_f28130-52\"] mark.kt-highlight{font-style:normal;color:#fed41e;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading16561_f28130-52 img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading16561_f28130-52[data-kb-block=\"kb-adv-heading16561_f28130-52\"] img.kb-inline-image{width:150px;vertical-align:baseline;}@media all and (max-width: 1024px){.wp-block-kadence-advancedheading.kt-adv-heading16561_f28130-52, .wp-block-kadence-advancedheading.kt-adv-heading16561_f28130-52[data-kb-block=\"kb-adv-heading16561_f28130-52\"]{margin-bottom:17.5px;text-align:center!important;}}@media all and (max-width: 767px){.wp-block-kadence-advancedheading.kt-adv-heading16561_f28130-52, .wp-block-kadence-advancedheading.kt-adv-heading16561_f28130-52[data-kb-block=\"kb-adv-heading16561_f28130-52\"]{text-align:left!important;}}<\/style>\n<h1 class=\"kt-adv-heading16561_f28130-52 wp-block-kadence-advancedheading has-theme-palette-9-color has-text-color\" data-kb-block=\"kb-adv-heading16561_f28130-52\">Big-picture <mark class=\"kt-highlight\">science<\/mark> lessons<\/h1>\n\n\n<style>.wp-block-kadence-advancedheading.kt-adv-heading16561_5fd1d4-fd, .wp-block-kadence-advancedheading.kt-adv-heading16561_5fd1d4-fd[data-kb-block=\"kb-adv-heading16561_5fd1d4-fd\"]{text-align:center;font-style:normal;}.wp-block-kadence-advancedheading.kt-adv-heading16561_5fd1d4-fd mark.kt-highlight, .wp-block-kadence-advancedheading.kt-adv-heading16561_5fd1d4-fd[data-kb-block=\"kb-adv-heading16561_5fd1d4-fd\"] mark.kt-highlight{font-style:normal;color:#f76a0c;-webkit-box-decoration-break:clone;box-decoration-break:clone;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.wp-block-kadence-advancedheading.kt-adv-heading16561_5fd1d4-fd img.kb-inline-image, .wp-block-kadence-advancedheading.kt-adv-heading16561_5fd1d4-fd[data-kb-block=\"kb-adv-heading16561_5fd1d4-fd\"] img.kb-inline-image{width:150px;vertical-align:baseline;}@media all and (max-width: 1024px){.wp-block-kadence-advancedheading.kt-adv-heading16561_5fd1d4-fd, .wp-block-kadence-advancedheading.kt-adv-heading16561_5fd1d4-fd[data-kb-block=\"kb-adv-heading16561_5fd1d4-fd\"]{text-align:center!important;}}@media all and (max-width: 767px){.wp-block-kadence-advancedheading.kt-adv-heading16561_5fd1d4-fd, .wp-block-kadence-advancedheading.kt-adv-heading16561_5fd1d4-fd[data-kb-block=\"kb-adv-heading16561_5fd1d4-fd\"]{text-align:left!important;}}<\/style>\n<p class=\"kt-adv-heading16561_5fd1d4-fd wp-block-kadence-advancedheading has-theme-palette-9-color has-text-color\" data-kb-block=\"kb-adv-heading16561_5fd1d4-fd\">We add new lessons every month<\/p>\n<\/div><\/div>\n\n<\/div><\/div>\n\n<style>.kb-row-layout-id16561_4b1e5e-fe > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id16561_4b1e5e-fe > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id16561_4b1e5e-fe > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-md, 2rem);padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id16561_4b1e5e-fe > .kt-row-layout-overlay{opacity:0.30;}@media all and (max-width: 1024px){.kb-row-layout-id16561_4b1e5e-fe > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}@media all and (max-width: 767px){.kb-row-layout-id16561_4b1e5e-fe > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id16561_4b1e5e-fe alignnone wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-1-columns kt-row-layout-equal kt-tab-layout-inherit kt-mobile-layout-row kt-row-valign-top\">\n<style>.kadence-column16561_27f542-5b > .kt-inside-inner-col,.kadence-column16561_27f542-5b > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column16561_27f542-5b > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column16561_27f542-5b > .kt-inside-inner-col{flex-direction:column;}.kadence-column16561_27f542-5b > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column16561_27f542-5b > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column16561_27f542-5b{position:relative;}@media all and (max-width: 1024px){.kadence-column16561_27f542-5b > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column16561_27f542-5b > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column16561_27f542-5b\"><div class=\"kt-inside-inner-col\"><style>.kb-row-layout-id16561_ba900d-6f > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id16561_ba900d-6f > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id16561_ba900d-6f > .kt-row-column-wrap{column-gap:var(--global-kb-gap-md, 2rem);row-gap:var(--global-kb-gap-md, 2rem);max-width:var( --global-content-width, 1290px );padding-left:var(--global-content-edge-padding);padding-right:var(--global-content-edge-padding);padding-top:var(--global-kb-spacing-sm, 1.5rem);padding-bottom:var(--global-kb-spacing-sm, 1.5rem);grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id16561_ba900d-6f{background-color:#f7f7ed;}.kb-row-layout-id16561_ba900d-6f > .kt-row-layout-overlay{opacity:0.30;}@media all and (max-width: 1024px){.kb-row-layout-id16561_ba900d-6f > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}@media all and (max-width: 767px){.kb-row-layout-id16561_ba900d-6f > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id16561_ba900d-6f alignnone kt-row-has-bg wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-1-columns kt-row-layout-equal kt-tab-layout-inherit kt-mobile-layout-row kt-row-valign-top kb-theme-content-width\">\n<style>.kadence-column16561_ca4851-b1 > .kt-inside-inner-col,.kadence-column16561_ca4851-b1 > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column16561_ca4851-b1 > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column16561_ca4851-b1 > .kt-inside-inner-col{flex-direction:column;}.kadence-column16561_ca4851-b1 > .kt-inside-inner-col > .aligncenter{width:100%;}.kadence-column16561_ca4851-b1 > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column16561_ca4851-b1{position:relative;}@media all and (max-width: 1024px){.kadence-column16561_ca4851-b1 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kadence-column16561_ca4851-b1 > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column16561_ca4851-b1\"><div class=\"kt-inside-inner-col\"><!-- ld-course-grid gutenberg block begin --><div class=\"learndash-block-inner learndash-wrapper\">\t\t<div class=\"learndash-course-grid-temp-css\" style=\"display: none;\">\n\t\t\t\t#ld-cg-mar6dd40hw .grid{grid-template-columns:repeat(3,minmax(0,1fr));}\t#ld-cg-mar6dd40hw .grid &gt; .item &gt; .post,\t#ld-cg-mar6dd40hw .grid &gt; .item .content{display:flex;flex-direction:column;height:100%;}\t#ld-cg-mar6dd40hw .grid &gt; .item .content &gt; *:last-child{margin-top:auto;}\t#ld-cg-mar6dd40hw .grid &gt; .item .content .entry-title,\t#ld-cg-mar6dd40hw .grid &gt; .item .content .entry-title *{font-size:1.3rem;}\t#ld-cg-mar6dd40hw .grid &gt; .item .content .entry-title{}\t#ld-cg-mar6dd40hw .grid &gt; .item .content .entry-title *{}\t#ld-cg-mar6dd40hw .grid &gt; .item .content .entry-content{font-size:17px;}\t#ld-cg-mar6dd40hw .grid &gt; .item .content .entry-content *{color: #686868;}\t#ld-cg-mar6dd40hw .grid &gt; .item .ribbon{background-color: #000000;}\t#ld-cg-mar6dd40hw .grid &gt; .item .ribbon,\t#ld-cg-mar6dd40hw .grid &gt; .item .ribbon *{}\t#ld-cg-mar6dd40hw .grid &gt; .item .icon{}\t#ld-cg-mar6dd40hw .grid &gt; .item .icon,\t#ld-cg-mar6dd40hw .grid &gt; .item .icon *{}\t#ld-cg-mar6dd40hw .grid &gt; .item .button,\t#ld-cg-mar6dd40hw .grid &gt; .item .button *{background-color: #ff6633;border:none;}\t#ld-cg-mar6dd40hw .grid &gt; .item .button,\t#ld-cg-mar6dd40hw .grid &gt; .item .button *{}\t\t<\/div>\n\t\t<div id=\"ld-cg-mar6dd40hw\" class=\"learndash-course-grid \" data-page=\"1\"  data-post_type=\"sfwd-courses\" data-per_page=\"120\" data-orderby=\"date\" data-order=\"DESC\" data-taxonomies=\"\" data-enrollment_status=\"\" data-progress_status=\"\" data-group_id=\"0\" data-thumbnail=\"1\" data-thumbnail_size=\"course-thumbnail\" data-ribbon=\"1\" data-video=\"\" data-content=\"1\" data-title=\"1\" data-title_clickable=\"1\" data-description=\"1\" data-description_char_max=\"120\" data-button=\"\" data-filter=\"1\" data-pagination=\"button\" data-grid_height_equal=\"1\" data-progress_bar=\"1\" data-post_meta=\"\" data-skin=\"grid\" data-card=\"grid-2\" data-columns=\"3\" data-min_column_width=\"250\" data-items_per_row=\"3\" data-font_family_title=\"\" data-font_family_description=\"\" data-font_size_title=\"1.3rem\" data-font_size_description=\"17px\" data-font_color_title=\"\" data-font_color_description=\"#686868\" data-background_color_title=\"\" data-background_color_description=\"\" data-background_color_ribbon=\"#000000\" data-font_color_ribbon=\"\" data-background_color_icon=\"\" data-font_color_icon=\"\" data-background_color_button=\"#ff6633\" data-font_color_button=\"\" data-class_name=\"\" data-id=\"ld-cg-mar6dd40hw\" data-filter_search=\"\" data-filter_taxonomies=\"ld_course_category\" data-filter_price=\"\" data-filter_price_min=\"0\" data-filter_price_max=\"1000\"><button class=\"toggle-filter\">Filter<\/button><div class=\"learndash-course-grid-filter\" data-course_grid_id=\"ld-cg-mar6dd40hw\" data-taxonomies=\"ld_course_category\"><div class=\"filter-wrapper\">\n\t<form method=\"POST\" name=\"learndash_course_grid_filter\">\n\t\t<input type=\"hidden\" id=\"_wpnonce\" name=\"_wpnonce\" value=\"6ab32014bd\" \/><input type=\"hidden\" name=\"_wp_http_referer\" value=\"\/es\/wp-json\/wp\/v2\/pages\/16561\" \/>\t\t\n\t\t\t\t\t<div class=\"filter taxonomies\">\n\t\t\t\t<div class=\"taxonomies-wrapper\">\n\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t<div class=\"taxonomy ld_course_category\">\n\t\t\t\t\t\t\t\t<label>Lesson Categories<\/label>\n\t\t\t\t\t\t\t\t<ul class=\"terms\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"term\">\n\t\t\t\t\t\t\t\t\t\t\t<label\n\t\t\t\t\t\t\t\t\t\t\t\tfor=\"ld-cg-mar6dd40hw-ld_course_category-anatomy\"\n\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\t<input\n\t\t\t\t\t\t\t\t\t\t\t\t\tid=\"ld-cg-mar6dd40hw-ld_course_category-anatomy\"\n\t\t\t\t\t\t\t\t\t\t\t\t\ttype=\"checkbox\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tname=\"ld_course_category[]\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tvalue=\"139\"\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\tAnatomy\t\t\t\t\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"term\">\n\t\t\t\t\t\t\t\t\t\t\t<label\n\t\t\t\t\t\t\t\t\t\t\t\tfor=\"ld-cg-mar6dd40hw-ld_course_category-earth-the-sun-and-our-solar-system\"\n\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\t<input\n\t\t\t\t\t\t\t\t\t\t\t\t\tid=\"ld-cg-mar6dd40hw-ld_course_category-earth-the-sun-and-our-solar-system\"\n\t\t\t\t\t\t\t\t\t\t\t\t\ttype=\"checkbox\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tname=\"ld_course_category[]\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tvalue=\"114\"\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\tEarth, the Sun, and Our Solar System\t\t\t\t\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"term\">\n\t\t\t\t\t\t\t\t\t\t\t<label\n\t\t\t\t\t\t\t\t\t\t\t\tfor=\"ld-cg-mar6dd40hw-ld_course_category-lower-elementary\"\n\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\t<input\n\t\t\t\t\t\t\t\t\t\t\t\t\tid=\"ld-cg-mar6dd40hw-ld_course_category-lower-elementary\"\n\t\t\t\t\t\t\t\t\t\t\t\t\ttype=\"checkbox\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tname=\"ld_course_category[]\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tvalue=\"141\"\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\tElementary &#8211; Lower\t\t\t\t\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"term\">\n\t\t\t\t\t\t\t\t\t\t\t<label\n\t\t\t\t\t\t\t\t\t\t\t\tfor=\"ld-cg-mar6dd40hw-ld_course_category-upper-elementary\"\n\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\t<input\n\t\t\t\t\t\t\t\t\t\t\t\t\tid=\"ld-cg-mar6dd40hw-ld_course_category-upper-elementary\"\n\t\t\t\t\t\t\t\t\t\t\t\t\ttype=\"checkbox\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tname=\"ld_course_category[]\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tvalue=\"142\"\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\tElementary &#8211; Upper\t\t\t\t\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"term\">\n\t\t\t\t\t\t\t\t\t\t\t<label\n\t\t\t\t\t\t\t\t\t\t\t\tfor=\"ld-cg-mar6dd40hw-ld_course_category-erosion\"\n\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\t<input\n\t\t\t\t\t\t\t\t\t\t\t\t\tid=\"ld-cg-mar6dd40hw-ld_course_category-erosion\"\n\t\t\t\t\t\t\t\t\t\t\t\t\ttype=\"checkbox\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tname=\"ld_course_category[]\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tvalue=\"124\"\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\tErosion\t\t\t\t\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"term\">\n\t\t\t\t\t\t\t\t\t\t\t<label\n\t\t\t\t\t\t\t\t\t\t\t\tfor=\"ld-cg-mar6dd40hw-ld_course_category-free\"\n\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\t<input\n\t\t\t\t\t\t\t\t\t\t\t\t\tid=\"ld-cg-mar6dd40hw-ld_course_category-free\"\n\t\t\t\t\t\t\t\t\t\t\t\t\ttype=\"checkbox\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tname=\"ld_course_category[]\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tvalue=\"121\"\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\tFree Lessons\t\t\t\t\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"term\">\n\t\t\t\t\t\t\t\t\t\t\t<label\n\t\t\t\t\t\t\t\t\t\t\t\tfor=\"ld-cg-mar6dd40hw-ld_course_category-geology\"\n\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\t<input\n\t\t\t\t\t\t\t\t\t\t\t\t\tid=\"ld-cg-mar6dd40hw-ld_course_category-geology\"\n\t\t\t\t\t\t\t\t\t\t\t\t\ttype=\"checkbox\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tname=\"ld_course_category[]\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tvalue=\"113\"\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\tGeology\t\t\t\t\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"term\">\n\t\t\t\t\t\t\t\t\t\t\t<label\n\t\t\t\t\t\t\t\t\t\t\t\tfor=\"ld-cg-mar6dd40hw-ld_course_category-invisible-forces\"\n\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\t<input\n\t\t\t\t\t\t\t\t\t\t\t\t\tid=\"ld-cg-mar6dd40hw-ld_course_category-invisible-forces\"\n\t\t\t\t\t\t\t\t\t\t\t\t\ttype=\"checkbox\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tname=\"ld_course_category[]\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tvalue=\"138\"\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\tInvisible Forces\t\t\t\t\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"term\">\n\t\t\t\t\t\t\t\t\t\t\t<label\n\t\t\t\t\t\t\t\t\t\t\t\tfor=\"ld-cg-mar6dd40hw-ld_course_category-life-science\"\n\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\t<input\n\t\t\t\t\t\t\t\t\t\t\t\t\tid=\"ld-cg-mar6dd40hw-ld_course_category-life-science\"\n\t\t\t\t\t\t\t\t\t\t\t\t\ttype=\"checkbox\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tname=\"ld_course_category[]\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tvalue=\"123\"\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\tLife Science\t\t\t\t\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"term\">\n\t\t\t\t\t\t\t\t\t\t\t<label\n\t\t\t\t\t\t\t\t\t\t\t\tfor=\"ld-cg-mar6dd40hw-ld_course_category-properties-of-matter\"\n\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\t<input\n\t\t\t\t\t\t\t\t\t\t\t\t\tid=\"ld-cg-mar6dd40hw-ld_course_category-properties-of-matter\"\n\t\t\t\t\t\t\t\t\t\t\t\t\ttype=\"checkbox\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tname=\"ld_course_category[]\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tvalue=\"111\"\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\tProperties of Matter\t\t\t\t\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"term\">\n\t\t\t\t\t\t\t\t\t\t\t<label\n\t\t\t\t\t\t\t\t\t\t\t\tfor=\"ld-cg-mar6dd40hw-ld_course_category-stem-lessons\"\n\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\t<input\n\t\t\t\t\t\t\t\t\t\t\t\t\tid=\"ld-cg-mar6dd40hw-ld_course_category-stem-lessons\"\n\t\t\t\t\t\t\t\t\t\t\t\t\ttype=\"checkbox\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tname=\"ld_course_category[]\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tvalue=\"116\"\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\tSTEM Beyond\t\t\t\t\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"term\">\n\t\t\t\t\t\t\t\t\t\t\t<label\n\t\t\t\t\t\t\t\t\t\t\t\tfor=\"ld-cg-mar6dd40hw-ld_course_category-teacher-tools\"\n\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\t<input\n\t\t\t\t\t\t\t\t\t\t\t\t\tid=\"ld-cg-mar6dd40hw-ld_course_category-teacher-tools\"\n\t\t\t\t\t\t\t\t\t\t\t\t\ttype=\"checkbox\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tname=\"ld_course_category[]\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tvalue=\"137\"\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\tTeacher Tools\t\t\t\t\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"term\">\n\t\t\t\t\t\t\t\t\t\t\t<label\n\t\t\t\t\t\t\t\t\t\t\t\tfor=\"ld-cg-mar6dd40hw-ld_course_category-the-great-lessons\"\n\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\t<input\n\t\t\t\t\t\t\t\t\t\t\t\t\tid=\"ld-cg-mar6dd40hw-ld_course_category-the-great-lessons\"\n\t\t\t\t\t\t\t\t\t\t\t\t\ttype=\"checkbox\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tname=\"ld_course_category[]\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tvalue=\"110\"\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\tThe Great Lessons\t\t\t\t\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"term\">\n\t\t\t\t\t\t\t\t\t\t\t<label\n\t\t\t\t\t\t\t\t\t\t\t\tfor=\"ld-cg-mar6dd40hw-ld_course_category-work-of-air\"\n\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\t<input\n\t\t\t\t\t\t\t\t\t\t\t\t\tid=\"ld-cg-mar6dd40hw-ld_course_category-work-of-air\"\n\t\t\t\t\t\t\t\t\t\t\t\t\ttype=\"checkbox\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tname=\"ld_course_category[]\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tvalue=\"115\"\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\tWork of Air\t\t\t\t\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<li class=\"term\">\n\t\t\t\t\t\t\t\t\t\t\t<label\n\t\t\t\t\t\t\t\t\t\t\t\tfor=\"ld-cg-mar6dd40hw-ld_course_category-work-of-water\"\n\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\t<input\n\t\t\t\t\t\t\t\t\t\t\t\t\tid=\"ld-cg-mar6dd40hw-ld_course_category-work-of-water\"\n\t\t\t\t\t\t\t\t\t\t\t\t\ttype=\"checkbox\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tname=\"ld_course_category[]\"\n\t\t\t\t\t\t\t\t\t\t\t\t\tvalue=\"119\"\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t\t\t\t\tWork of Water\t\t\t\t\t\t\t\t\t\t\t<\/label>\n\t\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/ul>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\n\t\t\n\t\t<div class=\"buttons\">\n\t\t\t<button class=\"button apply blue\">Apply<\/button>\n\t\t\t<button class=\"button clear grey\">Clear<\/button>\n\t\t<\/div>\n\t<\/form>\n<\/div>\n<\/div><div class=\"items-wrapper grid\">\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-11107\" class=\"post post-11107 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry category-montessori-foundations-physical-science ld_course_category-upper-elementary ld_course_category-free ld_course_category-geology\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t<div class=\"ribbon free\">\n\t\t\t\t\t\tFree\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/earths-crust\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1640\" height=\"959\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2026\/05\/Featured-image-Pangea.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Earth&#039;s Crust\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2026\/05\/Featured-image-Pangea.webp 1640w, https:\/\/learnlibre.com\/wp-content\/uploads\/2026\/05\/Featured-image-Pangea-300x175.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2026\/05\/Featured-image-Pangea-1024x599.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2026\/05\/Featured-image-Pangea-768x449.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2026\/05\/Featured-image-Pangea-1536x898.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2026\/05\/Featured-image-Pangea-18x12.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2026\/05\/Featured-image-Pangea-600x351.webp 600w\" sizes=\"auto, (max-width: 1640px) 100vw, 1640px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/earths-crust\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/earths-crust\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tEarth&#039;s Crust\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Upper Elementary<\/strong><br \/>\nIs the ground constantly moving beneath your feet?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-53031\" class=\"post post-53031 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry category-montessori-foundations-physical-science ld_course_category-lower-elementary ld_course_category-geology\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/earths-layers\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"2000\" height=\"1125\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2026\/03\/Featured-Earths-Layers.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Earth&#039;s Layers\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2026\/03\/Featured-Earths-Layers.webp 2000w, https:\/\/learnlibre.com\/wp-content\/uploads\/2026\/03\/Featured-Earths-Layers-300x169.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2026\/03\/Featured-Earths-Layers-1024x576.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2026\/03\/Featured-Earths-Layers-768x432.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2026\/03\/Featured-Earths-Layers-1536x864.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2026\/03\/Featured-Earths-Layers-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2026\/03\/Featured-Earths-Layers-600x338.webp 600w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/earths-layers\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/earths-layers\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tEarth&#039;s Layers\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nIf you could dig to the center of Earth, what would you find?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-52833\" class=\"post post-52833 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-anatomy ld_course_category-upper-elementary\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/rest-and-relaxation\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"2880\" height=\"1616\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/12\/Featured-Rest.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Rest and Relaxation\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/12\/Featured-Rest.webp 2880w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/12\/Featured-Rest-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/12\/Featured-Rest-1024x575.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/12\/Featured-Rest-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/12\/Featured-Rest-1536x862.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/12\/Featured-Rest-2048x1149.webp 2048w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/12\/Featured-Rest-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/12\/Featured-Rest-600x337.webp 600w\" sizes=\"auto, (max-width: 2880px) 100vw, 2880px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/rest-and-relaxation\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/rest-and-relaxation\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tRest and Relaxation\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Upper Elementary<\/strong><br \/>\nWhy do we sleep? What would happen if you didn\u2019t?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-52682\" class=\"post post-52682 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-anatomy ld_course_category-upper-elementary\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/the-nervous-system\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"2000\" height=\"1125\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/11\/The-Nervous-System-Featured.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"The Nervous System\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/11\/The-Nervous-System-Featured.webp 2000w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/11\/The-Nervous-System-Featured-300x169.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/11\/The-Nervous-System-Featured-1024x576.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/11\/The-Nervous-System-Featured-768x432.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/11\/The-Nervous-System-Featured-1536x864.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/11\/The-Nervous-System-Featured-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/11\/The-Nervous-System-Featured-600x338.webp 600w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/the-nervous-system\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/the-nervous-system\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tThe Nervous System\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Upper Elementary<\/strong><br \/>\nHow fast is your reaction time? Can you make it faster?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-52444\" class=\"post post-52444 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-anatomy ld_course_category-lower-elementary\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/heart-and-lungs\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"2880\" height=\"1610\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/09\/Featured-Heart-and-Lungs-1.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Heart and Lungs\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/09\/Featured-Heart-and-Lungs-1.webp 2880w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/09\/Featured-Heart-and-Lungs-1-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/09\/Featured-Heart-and-Lungs-1-1024x572.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/09\/Featured-Heart-and-Lungs-1-768x429.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/09\/Featured-Heart-and-Lungs-1-1536x859.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/09\/Featured-Heart-and-Lungs-1-2048x1145.webp 2048w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/09\/Featured-Heart-and-Lungs-1-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/09\/Featured-Heart-and-Lungs-1-600x335.webp 600w\" sizes=\"auto, (max-width: 2880px) 100vw, 2880px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/heart-and-lungs\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/heart-and-lungs\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tHeart and Lungs\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nHow do your heart and lungs connect and work together?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-52217\" class=\"post post-52217 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-anatomy ld_course_category-upper-elementary ld_course_category-free\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t<div class=\"ribbon free\">\n\t\t\t\t\t\tFree\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/senses-and-information-processing\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"2878\" height=\"1620\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/08\/Sensory-Featured.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Senses and Information Processing\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/08\/Sensory-Featured.webp 2878w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/08\/Sensory-Featured-300x169.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/08\/Sensory-Featured-1024x576.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/08\/Sensory-Featured-768x432.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/08\/Sensory-Featured-1536x865.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/08\/Sensory-Featured-2048x1153.webp 2048w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/08\/Sensory-Featured-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/08\/Sensory-Featured-600x338.webp 600w\" sizes=\"auto, (max-width: 2878px) 100vw, 2878px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/senses-and-information-processing\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/senses-and-information-processing\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tSenses and Information Processing\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Upper Elementary<\/strong><br \/>\nHow can your own senses play tricks on your brain?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-51664\" class=\"post post-51664 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-anatomy ld_course_category-lower-elementary\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/muscles-and-bones\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"3840\" height=\"2160\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/07\/Muscles-and-Bones-Featured.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Muscles and Bones\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/07\/Muscles-and-Bones-Featured.webp 3840w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/07\/Muscles-and-Bones-Featured-300x169.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/07\/Muscles-and-Bones-Featured-1024x576.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/07\/Muscles-and-Bones-Featured-768x432.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/07\/Muscles-and-Bones-Featured-1536x864.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/07\/Muscles-and-Bones-Featured-2048x1152.webp 2048w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/07\/Muscles-and-Bones-Featured-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/07\/Muscles-and-Bones-Featured-600x338.webp 600w\" sizes=\"auto, (max-width: 3840px) 100vw, 3840px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/muscles-and-bones\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/muscles-and-bones\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tMuscles and Bones\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nWhat do you think it would be like if you didn\u2019t have any bones?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-51258\" class=\"post post-51258 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-upper-elementary ld_course_category-work-of-water\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/water-quality-and-treatment\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"2880\" height=\"1620\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/06\/Water-quality-and-treatment-featured-photo.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Water Quality and Treatment\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/06\/Water-quality-and-treatment-featured-photo.webp 2880w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/06\/Water-quality-and-treatment-featured-photo-300x169.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/06\/Water-quality-and-treatment-featured-photo-1024x576.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/06\/Water-quality-and-treatment-featured-photo-768x432.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/06\/Water-quality-and-treatment-featured-photo-1536x864.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/06\/Water-quality-and-treatment-featured-photo-2048x1152.webp 2048w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/06\/Water-quality-and-treatment-featured-photo-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/06\/Water-quality-and-treatment-featured-photo-600x338.webp 600w\" sizes=\"auto, (max-width: 2880px) 100vw, 2880px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/water-quality-and-treatment\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/water-quality-and-treatment\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tWater Quality and Treatment\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Upper Elementary<\/strong><br \/>\nWhere does the water you use every day come from?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-50327\" class=\"post post-50327 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-upper-elementary ld_course_category-free ld_course_category-work-of-water\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t<div class=\"ribbon free\">\n\t\t\t\t\t\tFree\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/the-water-cycle\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/04\/The-Water-Cycle-Featured.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"The Water Cycle\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/04\/The-Water-Cycle-Featured.webp 1200w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/04\/The-Water-Cycle-Featured-300x169.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/04\/The-Water-Cycle-Featured-1024x576.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/04\/The-Water-Cycle-Featured-768x432.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/04\/The-Water-Cycle-Featured-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/04\/The-Water-Cycle-Featured-600x338.webp 600w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/the-water-cycle\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/the-water-cycle\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tThe Water Cycle\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Upper Elementary<\/strong><br \/>\nCould we be drinking the same water that dinosaurs drank?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-50080\" class=\"post post-50080 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-anatomy ld_course_category-lower-elementary\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/the-digestive-system\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1692\" height=\"946\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/03\/Featured-The-Digestive-System.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"The Digestive System\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/03\/Featured-The-Digestive-System.webp 1692w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/03\/Featured-The-Digestive-System-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/03\/Featured-The-Digestive-System-1024x573.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/03\/Featured-The-Digestive-System-768x429.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/03\/Featured-The-Digestive-System-1536x859.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/03\/Featured-The-Digestive-System-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/03\/Featured-The-Digestive-System-624x349.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/03\/Featured-The-Digestive-System-600x335.webp 600w\" sizes=\"auto, (max-width: 1692px) 100vw, 1692px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/the-digestive-system\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/the-digestive-system\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tThe Digestive System\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nWhy do we poop? What\u2019s actually happening inside our bodies?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-49805\" class=\"post post-49805 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-lower-elementary ld_course_category-life-science\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/animal-research\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1900\" height=\"1064\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/02\/Featured-Image-Animal-Research.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Animal Research\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/02\/Featured-Image-Animal-Research.webp 1900w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/02\/Featured-Image-Animal-Research-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/02\/Featured-Image-Animal-Research-1024x573.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/02\/Featured-Image-Animal-Research-768x430.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/02\/Featured-Image-Animal-Research-1536x860.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/02\/Featured-Image-Animal-Research-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/02\/Featured-Image-Animal-Research-624x349.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2025\/02\/Featured-Image-Animal-Research-600x336.webp 600w\" sizes=\"auto, (max-width: 1900px) 100vw, 1900px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/animal-research\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/animal-research\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tAnimal Research\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nDo dogs lay eggs, or do they give birth to live young?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-49252\" class=\"post post-49252 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-lower-elementary ld_course_category-free ld_course_category-invisible-forces\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t<div class=\"ribbon free\">\n\t\t\t\t\t\tFree\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/magnetic-fields-and-navigation\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1736\" height=\"974\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/12\/Magnetic-Fields-and-Nav.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Magnetic Fields and Navigation\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/12\/Magnetic-Fields-and-Nav.webp 1736w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/12\/Magnetic-Fields-and-Nav-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/12\/Magnetic-Fields-and-Nav-1024x575.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/12\/Magnetic-Fields-and-Nav-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/12\/Magnetic-Fields-and-Nav-1536x862.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/12\/Magnetic-Fields-and-Nav-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/12\/Magnetic-Fields-and-Nav-624x350.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/12\/Magnetic-Fields-and-Nav-600x337.webp 600w\" sizes=\"auto, (max-width: 1736px) 100vw, 1736px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/magnetic-fields-and-navigation\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/magnetic-fields-and-navigation\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tMagnetic Fields and Navigation\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nHow did people navigate the world before GPS?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-48787\" class=\"post post-48787 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-upper-elementary ld_course_category-invisible-forces\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/gravity\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1736\" height=\"974\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/11\/Gravity-and-weight-featured.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Gravity and Weight\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/11\/Gravity-and-weight-featured.webp 1736w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/11\/Gravity-and-weight-featured-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/11\/Gravity-and-weight-featured-1024x575.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/11\/Gravity-and-weight-featured-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/11\/Gravity-and-weight-featured-1536x862.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/11\/Gravity-and-weight-featured-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/11\/Gravity-and-weight-featured-624x350.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/11\/Gravity-and-weight-featured-600x337.webp 600w\" sizes=\"auto, (max-width: 1736px) 100vw, 1736px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/gravity\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/gravity\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tGravity and Weight\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Upper Elementary<\/strong><br \/>\nDo you weigh the same on the Moon as you do on Earth?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-48177\" class=\"post post-48177 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-lower-elementary ld_course_category-invisible-forces\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/magnetism\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1736\" height=\"974\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/09\/magnetism-featured.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Magnetism\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/09\/magnetism-featured.webp 1736w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/09\/magnetism-featured-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/09\/magnetism-featured-1024x575.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/09\/magnetism-featured-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/09\/magnetism-featured-1536x862.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/09\/magnetism-featured-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/09\/magnetism-featured-624x350.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/09\/magnetism-featured-600x337.webp 600w\" sizes=\"auto, (max-width: 1736px) 100vw, 1736px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/magnetism\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/magnetism\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tMagnetism\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nHow could you move something without touching it?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-47773\" class=\"post post-47773 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-upper-elementary ld_course_category-invisible-forces\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/fluid-resistance-and-drag\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1736\" height=\"974\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/08\/Fluid-Resistance-and-Drag-featured.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Fluid Resistance and Drag\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/08\/Fluid-Resistance-and-Drag-featured.webp 1736w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/08\/Fluid-Resistance-and-Drag-featured-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/08\/Fluid-Resistance-and-Drag-featured-1024x575.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/08\/Fluid-Resistance-and-Drag-featured-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/08\/Fluid-Resistance-and-Drag-featured-1536x862.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/08\/Fluid-Resistance-and-Drag-featured-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/08\/Fluid-Resistance-and-Drag-featured-624x350.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/08\/Fluid-Resistance-and-Drag-featured-600x337.webp 600w\" sizes=\"auto, (max-width: 1736px) 100vw, 1736px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/fluid-resistance-and-drag\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/fluid-resistance-and-drag\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tFluid Resistance and Drag\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Upper Elementary<\/strong><br \/>\nWhy does it hurt so much when you do a belly flop into the water?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-47538\" class=\"post post-47538 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-lower-elementary ld_course_category-invisible-forces\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/friction\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1736\" height=\"974\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/07\/Friction-featured.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Friction\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/07\/Friction-featured.webp 1736w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/07\/Friction-featured-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/07\/Friction-featured-1024x575.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/07\/Friction-featured-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/07\/Friction-featured-1536x862.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/07\/Friction-featured-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/07\/Friction-featured-624x350.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/07\/Friction-featured-600x337.webp 600w\" sizes=\"auto, (max-width: 1736px) 100vw, 1736px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/friction\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/friction\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tFriction\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nHave you ever tried sliding down a slide and suddenly stopped halfway?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-46900\" class=\"post post-46900 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-lower-elementary ld_course_category-life-science\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/parts-of-a-leaf\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1736\" height=\"974\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/05\/Parts-of-a-Leaf-featured.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Parts of a Leaf\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/05\/Parts-of-a-Leaf-featured.webp 1736w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/05\/Parts-of-a-Leaf-featured-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/05\/Parts-of-a-Leaf-featured-1024x575.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/05\/Parts-of-a-Leaf-featured-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/05\/Parts-of-a-Leaf-featured-1536x862.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/05\/Parts-of-a-Leaf-featured-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/05\/Parts-of-a-Leaf-featured-624x350.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/05\/Parts-of-a-Leaf-featured-600x337.webp 600w\" sizes=\"auto, (max-width: 1736px) 100vw, 1736px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/parts-of-a-leaf\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/parts-of-a-leaf\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tParts of a Leaf\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nWhy do you think leaves have all those little lines?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-10721\" class=\"post post-10721 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry category-montessori-foundations-physical-science ld_course_category-lower-elementary ld_course_category-free ld_course_category-the-great-lessons\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t<div class=\"ribbon free\">\n\t\t\t\t\t\tFree\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/the-first-great-lesson\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1736\" height=\"974\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-First-Great-Lesson-feature-img.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"The First Great Lesson\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-First-Great-Lesson-feature-img.webp 1736w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-First-Great-Lesson-feature-img-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-First-Great-Lesson-feature-img-1024x575.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-First-Great-Lesson-feature-img-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-First-Great-Lesson-feature-img-1536x862.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-First-Great-Lesson-feature-img-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-First-Great-Lesson-feature-img-624x350.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-First-Great-Lesson-feature-img-600x337.webp 600w\" sizes=\"auto, (max-width: 1736px) 100vw, 1736px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/the-first-great-lesson\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/the-first-great-lesson\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tThe First Great Lesson\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nWhere did the stars come from? And the Sun? How was our Earth created?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-34516\" class=\"post post-34516 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-lower-elementary ld_course_category-the-great-lessons\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/the-second-great-lesson\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1736\" height=\"974\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-Second-Great-Lesson.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"The Second Great Lesson\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-Second-Great-Lesson.webp 1736w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-Second-Great-Lesson-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-Second-Great-Lesson-1024x575.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-Second-Great-Lesson-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-Second-Great-Lesson-1536x862.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-Second-Great-Lesson-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-Second-Great-Lesson-624x350.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-Second-Great-Lesson-600x337.webp 600w\" sizes=\"auto, (max-width: 1736px) 100vw, 1736px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/the-second-great-lesson\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/the-second-great-lesson\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tThe Second Great Lesson\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nWhere did life on Earth come from, and how has it changed the planet?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-46492\" class=\"post post-46492 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-lower-elementary ld_course_category-stem-lessons\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/what-is-sound\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1736\" height=\"974\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/What-Is-Sound-featured-img.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"What Is Sound?\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/What-Is-Sound-featured-img.webp 1736w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/What-Is-Sound-featured-img-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/What-Is-Sound-featured-img-1024x575.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/What-Is-Sound-featured-img-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/What-Is-Sound-featured-img-1536x862.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/What-Is-Sound-featured-img-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/What-Is-Sound-featured-img-624x350.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/What-Is-Sound-featured-img-600x337.webp 600w\" sizes=\"auto, (max-width: 1736px) 100vw, 1736px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/what-is-sound\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/what-is-sound\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tWhat Is Sound?\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nCan you hear sound? Can you feel it? Can you see it?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-10470\" class=\"post post-10470 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry category-montessori-foundations-physical-science ld_course_category-lower-elementary ld_course_category-stem-lessons\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/scientific-method\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1736\" height=\"974\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-Scientific-Method-featured.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"The Scientific Method and Lab Safety\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-Scientific-Method-featured.webp 1736w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-Scientific-Method-featured-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-Scientific-Method-featured-1024x575.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-Scientific-Method-featured-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-Scientific-Method-featured-1536x862.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-Scientific-Method-featured-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-Scientific-Method-featured-624x350.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-Scientific-Method-featured-600x337.webp 600w\" sizes=\"auto, (max-width: 1736px) 100vw, 1736px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/scientific-method\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/scientific-method\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tThe Scientific Method and Lab Safety\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nDo you use the scientific method every day without realizing it?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-34995\" class=\"post post-34995 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-lower-elementary ld_course_category-life-science\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t<div class=\"ribbon\">\n\t\t\t\t\t\tFree\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/plant-nature-walk-intro-to-botany\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1736\" height=\"974\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Plant-Nature-Walk-img.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Plant Nature Walk (Intro to Botany)\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Plant-Nature-Walk-img.webp 1736w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Plant-Nature-Walk-img-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Plant-Nature-Walk-img-1024x575.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Plant-Nature-Walk-img-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Plant-Nature-Walk-img-1536x862.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Plant-Nature-Walk-img-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Plant-Nature-Walk-img-624x350.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Plant-Nature-Walk-img-600x337.webp 600w\" sizes=\"auto, (max-width: 1736px) 100vw, 1736px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/plant-nature-walk-intro-to-botany\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/plant-nature-walk-intro-to-botany\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tPlant Nature Walk (Intro to Botany)\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nCan nature quietly sneak into the busiest parts of the city?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-31457\" class=\"post post-31457 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-upper-elementary ld_course_category-erosion\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/erosion-valleys-and-canyons\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"505\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Erosion-Valleys-Canyons-Featured.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Erosion, Valleys, and Canyons\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Erosion-Valleys-Canyons-Featured.webp 900w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Erosion-Valleys-Canyons-Featured-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Erosion-Valleys-Canyons-Featured-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Erosion-Valleys-Canyons-Featured-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Erosion-Valleys-Canyons-Featured-600x337.webp 600w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/erosion-valleys-and-canyons\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/erosion-valleys-and-canyons\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tErosion, Valleys, and Canyons\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Upper Elementary<\/strong><br \/>\nWhat happens when a river flows in the same place for millions of years?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-28855\" class=\"post post-28855 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-lower-elementary ld_course_category-work-of-water\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/intro-to-the-work-of-water\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"2880\" height=\"1616\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Intro-to-the-Work-of-Water-Featured-Image.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Intro to the Work of Water\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Intro-to-the-Work-of-Water-Featured-Image.webp 2880w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Intro-to-the-Work-of-Water-Featured-Image-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Intro-to-the-Work-of-Water-Featured-Image-1024x575.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Intro-to-the-Work-of-Water-Featured-Image-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Intro-to-the-Work-of-Water-Featured-Image-1536x862.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Intro-to-the-Work-of-Water-Featured-Image-2048x1149.webp 2048w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Intro-to-the-Work-of-Water-Featured-Image-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Intro-to-the-Work-of-Water-Featured-Image-600x337.webp 600w\" sizes=\"auto, (max-width: 2880px) 100vw, 2880px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/intro-to-the-work-of-water\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/intro-to-the-work-of-water\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tIntro to the Work of Water\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nWhat do you and Earth\u2019s surface have in common?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-24115\" class=\"post post-24115 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry category-montessori-foundations-physical-science ld_course_category-lower-elementary ld_course_category-work-of-air\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/foundations-for-the-work-of-air\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1736\" height=\"974\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Foundations-for-the-Work-of-Air-featured.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Foundations for the Work of Air\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Foundations-for-the-Work-of-Air-featured.webp 1736w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Foundations-for-the-Work-of-Air-featured-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Foundations-for-the-Work-of-Air-featured-1024x575.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Foundations-for-the-Work-of-Air-featured-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Foundations-for-the-Work-of-Air-featured-1536x862.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Foundations-for-the-Work-of-Air-featured-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Foundations-for-the-Work-of-Air-featured-624x350.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Foundations-for-the-Work-of-Air-featured-600x337.webp 600w\" sizes=\"auto, (max-width: 1736px) 100vw, 1736px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/foundations-for-the-work-of-air\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/foundations-for-the-work-of-air\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tFoundations for the Work of Air\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nHow do we know that air exists? What makes air move?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-11109\" class=\"post post-11109 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry category-montessori-foundations-physical-science ld_course_category-earth-the-sun-and-our-solar-system ld_course_category-lower-elementary\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/our-solar-system-and-planetary-movement\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"505\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Our-Solar-System-Featured-Image.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Our Solar System and Planetary Movement\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Our-Solar-System-Featured-Image.webp 900w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Our-Solar-System-Featured-Image-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Our-Solar-System-Featured-Image-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Our-Solar-System-Featured-Image-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Our-Solar-System-Featured-Image-600x337.webp 600w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/our-solar-system-and-planetary-movement\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/our-solar-system-and-planetary-movement\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tOur Solar System and Planetary Movement\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nWhy don\u2019t we float off into outer space? Why is a year 365 days?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-10532\" class=\"post post-10532 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry category-montessori-foundations-physical-science ld_course_category-lower-elementary ld_course_category-geology\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/composition-of-the-earth\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1736\" height=\"974\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Composition-of-Earth-featured.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Composition of Earth\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Composition-of-Earth-featured.webp 1736w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Composition-of-Earth-featured-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Composition-of-Earth-featured-1024x575.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Composition-of-Earth-featured-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Composition-of-Earth-featured-1536x862.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Composition-of-Earth-featured-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Composition-of-Earth-featured-624x350.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Composition-of-Earth-featured-600x337.webp 600w\" sizes=\"auto, (max-width: 1736px) 100vw, 1736px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/composition-of-the-earth\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/composition-of-the-earth\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tComposition of Earth\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nIf you could get to the center of Earth, what would you find?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-10348\" class=\"post post-10348 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry category-montessori-foundations-physical-science ld_course_category-lower-elementary ld_course_category-properties-of-matter\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/combining-and-separating\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1736\" height=\"974\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Combining-and-Separating-featured.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Combining and Separating\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Combining-and-Separating-featured.webp 1736w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Combining-and-Separating-featured-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Combining-and-Separating-featured-1024x575.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Combining-and-Separating-featured-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Combining-and-Separating-featured-1536x862.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Combining-and-Separating-featured-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Combining-and-Separating-featured-624x350.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Combining-and-Separating-featured-600x337.webp 600w\" sizes=\"auto, (max-width: 1736px) 100vw, 1736px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/combining-and-separating\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/combining-and-separating\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tCombining and Separating\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nWhy does sand settle to the bottom of the ocean, but salt mixes in?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-11089\" class=\"post post-11089 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry category-montessori-foundations-physical-science ld_course_category-lower-elementary ld_course_category-properties-of-matter\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/crystallization\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"2000\" height=\"1125\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Crystallization-featured-img.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Crystallization\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Crystallization-featured-img.webp 2000w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Crystallization-featured-img-300x169.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Crystallization-featured-img-1024x576.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Crystallization-featured-img-768x432.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Crystallization-featured-img-1536x864.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Crystallization-featured-img-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Crystallization-featured-img-624x351.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Crystallization-featured-img-600x338.webp 600w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/crystallization\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/crystallization\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tCrystallization\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nCan you tell the difference between sugar and salt without tasting them?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-18361\" class=\"post post-18361 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry category-montessori-foundations-physical-science ld_course_category-upper-elementary ld_course_category-stem-lessons\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/the-story-of-the-elements\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"505\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-Story-of-the-Elements-Featured-Image.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"The Story of the Elements\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-Story-of-the-Elements-Featured-Image.webp 900w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-Story-of-the-Elements-Featured-Image-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-Story-of-the-Elements-Featured-Image-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-Story-of-the-Elements-Featured-Image-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-Story-of-the-Elements-Featured-Image-600x337.webp 600w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/the-story-of-the-elements\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/the-story-of-the-elements\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tThe Story of the Elements\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Upper Elementary<\/strong><br \/>\nHow did people discover oxygen if they couldn&#8217;t see it?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-35345\" class=\"post post-35345 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-lower-elementary ld_course_category-life-science\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/parts-of-a-plant\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1736\" height=\"974\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Parts-of-a-Plant.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Parts of a Plant\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Parts-of-a-Plant.webp 1736w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Parts-of-a-Plant-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Parts-of-a-Plant-1024x575.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Parts-of-a-Plant-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Parts-of-a-Plant-1536x862.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Parts-of-a-Plant-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Parts-of-a-Plant-624x350.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Parts-of-a-Plant-600x337.webp 600w\" sizes=\"auto, (max-width: 1736px) 100vw, 1736px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/parts-of-a-plant\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/parts-of-a-plant\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tParts of a Plant\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nCan you name any parts of a plant you&#8217;ve eaten before?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-37728\" class=\"post post-37728 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-lower-elementary ld_course_category-life-science\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/needs-of-the-plant\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1910\" height=\"1074\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Needs-of-the-Plant.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Needs of the Plant\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Needs-of-the-Plant.webp 1910w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Needs-of-the-Plant-300x169.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Needs-of-the-Plant-1024x576.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Needs-of-the-Plant-768x432.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Needs-of-the-Plant-1536x864.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Needs-of-the-Plant-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Needs-of-the-Plant-624x351.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Needs-of-the-Plant-600x337.webp 600w\" sizes=\"auto, (max-width: 1910px) 100vw, 1910px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/needs-of-the-plant\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/needs-of-the-plant\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tNeeds of the Plant\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nWhat does a plant need in order to grow healthy and strong?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-32144\" class=\"post post-32144 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-upper-elementary ld_course_category-erosion\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/how-to-stop-erosion\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1868\" height=\"1048\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/How-to-Stop-Erosion.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"How to Stop Erosion\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/How-to-Stop-Erosion.webp 1868w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/How-to-Stop-Erosion-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/How-to-Stop-Erosion-1024x574.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/How-to-Stop-Erosion-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/How-to-Stop-Erosion-1536x862.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/How-to-Stop-Erosion-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/How-to-Stop-Erosion-624x350.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/How-to-Stop-Erosion-600x337.webp 600w\" sizes=\"auto, (max-width: 1868px) 100vw, 1868px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/how-to-stop-erosion\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/how-to-stop-erosion\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tHow to Stop Erosion\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Upper Elementary<\/strong><br \/>\nWhy do some places experience more erosion than others?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-38191\" class=\"post post-38191 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-lower-elementary ld_course_category-life-science\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/the-leaf-food-factory-photosynthesis\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"506\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Photosynthesis-Featured-Image.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"The Leaf Food Factory (Photosynthesis)\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Photosynthesis-Featured-Image.webp 900w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Photosynthesis-Featured-Image-300x169.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Photosynthesis-Featured-Image-768x432.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Photosynthesis-Featured-Image-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Photosynthesis-Featured-Image-600x337.webp 600w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/the-leaf-food-factory-photosynthesis\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/the-leaf-food-factory-photosynthesis\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tThe Leaf Food Factory (Photosynthesis)\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nCan plants make their own food? How do you think they do it?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-28868\" class=\"post post-28868 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-lower-elementary ld_course_category-work-of-water\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/the-river\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"505\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-River-Featured-Image.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"The River\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-River-Featured-Image.webp 900w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-River-Featured-Image-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-River-Featured-Image-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-River-Featured-Image-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/The-River-Featured-Image-600x337.webp 600w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/the-river\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/the-river\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tThe River\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nWhy are rivers so windy? Why don\u2019t they flow straight?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-24598\" class=\"post post-24598 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry category-montessori-foundations-physical-science ld_course_category-upper-elementary ld_course_category-work-of-air\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/earths-blanket\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1736\" height=\"974\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Earths-Blanket.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Earth&#039;s Blanket\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Earths-Blanket.webp 1736w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Earths-Blanket-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Earths-Blanket-1024x575.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Earths-Blanket-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Earths-Blanket-1536x862.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Earths-Blanket-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Earths-Blanket-624x350.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Earths-Blanket-600x337.webp 600w\" sizes=\"auto, (max-width: 1736px) 100vw, 1736px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/earths-blanket\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/earths-blanket\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tEarth&#039;s Blanket\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Upper Elementary<\/strong><br \/>\nHow does Earth stay warm? Why is Earth getting warmer?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-40640\" class=\"post post-40640 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-lower-elementary ld_course_category-life-science\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/can-plants-move\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"506\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Can-Plants-Move-Featured-Image.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Can Plants Move?\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Can-Plants-Move-Featured-Image.webp 900w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Can-Plants-Move-Featured-Image-300x169.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Can-Plants-Move-Featured-Image-768x432.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Can-Plants-Move-Featured-Image-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Can-Plants-Move-Featured-Image-600x337.webp 600w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/can-plants-move\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/can-plants-move\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tCan Plants Move?\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nHow do plants get what they need to survive? Can they move to find it?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-11095\" class=\"post post-11095 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry category-montessori-foundations-physical-science ld_course_category-earth-the-sun-and-our-solar-system ld_course_category-lower-elementary\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/earth-and-sun\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1736\" height=\"974\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Earth-and-Sun-featured.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Earth and Sun\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Earth-and-Sun-featured.webp 1736w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Earth-and-Sun-featured-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Earth-and-Sun-featured-1024x575.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Earth-and-Sun-featured-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Earth-and-Sun-featured-1536x862.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Earth-and-Sun-featured-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Earth-and-Sun-featured-624x350.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Earth-and-Sun-featured-600x337.webp 600w\" sizes=\"auto, (max-width: 1736px) 100vw, 1736px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/earth-and-sun\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/earth-and-sun\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tEarth and Sun\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nWhy does the sun rise and set every day? What if one day it didn\u2019t?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-11093\" class=\"post post-11093 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry category-montessori-foundations-physical-science ld_course_category-lower-elementary ld_course_category-properties-of-matter\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/different-properties-at-different-temperatures\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1736\" height=\"974\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Different-Properties-at-Different-Temperatures.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Different Properties at Different Temperatures\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Different-Properties-at-Different-Temperatures.webp 1736w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Different-Properties-at-Different-Temperatures-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Different-Properties-at-Different-Temperatures-1024x575.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Different-Properties-at-Different-Temperatures-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Different-Properties-at-Different-Temperatures-1536x862.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Different-Properties-at-Different-Temperatures-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Different-Properties-at-Different-Temperatures-624x350.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Different-Properties-at-Different-Temperatures-600x337.webp 600w\" sizes=\"auto, (max-width: 1736px) 100vw, 1736px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/different-properties-at-different-temperatures\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/different-properties-at-different-temperatures\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tDifferent Properties at Different Temperatures\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nWhat makes something change from a solid to a liquid to a gas?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-11111\" class=\"post post-11111 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry category-montessori-foundations-physical-science ld_course_category-lower-elementary ld_course_category-properties-of-matter\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/particle-behavior-solids-liquids-and-gases\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1736\" height=\"974\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Particle-Behavior-featured.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Particle Behavior - Solids, Liquids, and Gases\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Particle-Behavior-featured.webp 1736w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Particle-Behavior-featured-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Particle-Behavior-featured-1024x575.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Particle-Behavior-featured-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Particle-Behavior-featured-1536x862.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Particle-Behavior-featured-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Particle-Behavior-featured-624x350.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Particle-Behavior-featured-600x337.webp 600w\" sizes=\"auto, (max-width: 1736px) 100vw, 1736px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/particle-behavior-solids-liquids-and-gases\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/particle-behavior-solids-liquids-and-gases\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tParticle Behavior &#8211; Solids, Liquids, and Gases\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nHow do states of matter apply pressure and makes their presence known?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-23331\" class=\"post post-23331 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry category-montessori-foundations-physical-science ld_course_category-lower-elementary ld_course_category-stem-lessons\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/how-did-humans-discover-fire\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1736\" height=\"974\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/How-Did-Humans-Discover-Fire-img.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"How Did Humans Discover Fire?\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/How-Did-Humans-Discover-Fire-img.webp 1736w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/How-Did-Humans-Discover-Fire-img-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/How-Did-Humans-Discover-Fire-img-1024x575.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/How-Did-Humans-Discover-Fire-img-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/How-Did-Humans-Discover-Fire-img-1536x862.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/How-Did-Humans-Discover-Fire-img-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/How-Did-Humans-Discover-Fire-img-624x350.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/How-Did-Humans-Discover-Fire-img-600x337.webp 600w\" sizes=\"auto, (max-width: 1736px) 100vw, 1736px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/how-did-humans-discover-fire\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/how-did-humans-discover-fire\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tHow Did Humans Discover Fire?\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nWhen did we start using fire? What 3 things does fire need to burn?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-32318\" class=\"post post-32318 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-upper-elementary ld_course_category-erosion\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/erosion-from-rainfall\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1736\" height=\"974\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Erosion-from-Rainfall.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Erosion from Rainfall\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Erosion-from-Rainfall.webp 1736w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Erosion-from-Rainfall-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Erosion-from-Rainfall-1024x575.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Erosion-from-Rainfall-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Erosion-from-Rainfall-1536x862.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Erosion-from-Rainfall-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Erosion-from-Rainfall-624x350.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Erosion-from-Rainfall-600x337.webp 600w\" sizes=\"auto, (max-width: 1736px) 100vw, 1736px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/erosion-from-rainfall\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/erosion-from-rainfall\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tErosion from Rainfall\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Upper Elementary<\/strong><br \/>\nHave you ever seen a rock shaped just like a mushroom?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-29147\" class=\"post post-29147 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-lower-elementary ld_course_category-work-of-water\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/parts-of-a-river\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1736\" height=\"974\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Parts-of-a-River.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Parts of a River\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Parts-of-a-River.webp 1736w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Parts-of-a-River-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Parts-of-a-River-1024x575.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Parts-of-a-River-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Parts-of-a-River-1536x862.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Parts-of-a-River-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Parts-of-a-River-624x350.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Parts-of-a-River-600x337.webp 600w\" sizes=\"auto, (max-width: 1736px) 100vw, 1736px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/parts-of-a-river\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/parts-of-a-river\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tParts of a River\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nWhat has a mouth but never talks? What has a bed but never sleeps?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-26224\" class=\"post post-26224 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry category-montessori-foundations-physical-science ld_course_category-upper-elementary ld_course_category-work-of-air\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/where-does-the-wind-come-from\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1736\" height=\"974\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Where-Does-the-Wind-Come-From-featured.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Where Does the Wind Come From?\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Where-Does-the-Wind-Come-From-featured.webp 1736w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Where-Does-the-Wind-Come-From-featured-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Where-Does-the-Wind-Come-From-featured-1024x575.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Where-Does-the-Wind-Come-From-featured-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Where-Does-the-Wind-Come-From-featured-1536x862.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Where-Does-the-Wind-Come-From-featured-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Where-Does-the-Wind-Come-From-featured-624x350.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Where-Does-the-Wind-Come-From-featured-600x337.webp 600w\" sizes=\"auto, (max-width: 1736px) 100vw, 1736px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/where-does-the-wind-come-from\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/where-does-the-wind-come-from\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tWhere Does the Wind Come From?\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Upper Elementary<\/strong><br \/>\nWho (or what) makes the wind? Do we need the wind?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-11113\" class=\"post post-11113 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry category-montessori-foundations-physical-science ld_course_category-earth-the-sun-and-our-solar-system ld_course_category-lower-elementary\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/when-light-hits-a-sphere\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1736\" height=\"974\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/When-Light-Hits-a-Sphere.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"When Light Hits a Sphere\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/When-Light-Hits-a-Sphere.webp 1736w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/When-Light-Hits-a-Sphere-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/When-Light-Hits-a-Sphere-1024x575.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/When-Light-Hits-a-Sphere-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/When-Light-Hits-a-Sphere-1536x862.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/When-Light-Hits-a-Sphere-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/When-Light-Hits-a-Sphere-624x350.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/When-Light-Hits-a-Sphere-600x337.webp 600w\" sizes=\"auto, (max-width: 1736px) 100vw, 1736px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/when-light-hits-a-sphere\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/when-light-hits-a-sphere\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tWhen Light Hits a Sphere\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nWhy is it always hotter in Brazil than it is in Antarctica?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-11101\" class=\"post post-11101 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry category-montessori-foundations-physical-science ld_course_category-lower-elementary ld_course_category-properties-of-matter\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/force-direction-of-solids-liquids-and-gases\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1736\" height=\"974\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Force-Direction.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Force Direction of Solids, Liquids, and Gases\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Force-Direction.webp 1736w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Force-Direction-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Force-Direction-1024x575.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Force-Direction-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Force-Direction-1536x862.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Force-Direction-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Force-Direction-624x350.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Force-Direction-600x337.webp 600w\" sizes=\"auto, (max-width: 1736px) 100vw, 1736px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/force-direction-of-solids-liquids-and-gases\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/force-direction-of-solids-liquids-and-gases\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tForce Direction of Solids, Liquids, and Gases\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nWhat is force? Do we have force? Does matter have force?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-36187\" class=\"post post-36187 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-lower-elementary ld_course_category-life-science\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/animal-nature-walk-intro-to-zoology\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"505\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Animal-Nature-Walk-Featured-Img.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Animal Nature Walk (Intro to Zoology)\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Animal-Nature-Walk-Featured-Img.webp 900w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Animal-Nature-Walk-Featured-Img-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Animal-Nature-Walk-Featured-Img-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Animal-Nature-Walk-Featured-Img-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Animal-Nature-Walk-Featured-Img-600x337.webp 600w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/animal-nature-walk-intro-to-zoology\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/animal-nature-walk-intro-to-zoology\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tAnimal Nature Walk (Intro to Zoology)\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nWhat kinds of living creatures do scientists classify as animals?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-11105\" class=\"post post-11105 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry category-montessori-foundations-physical-science ld_course_category-lower-elementary ld_course_category-properties-of-matter\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/viscous-and-fluid-rigid-elastic-and-plastic\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1736\" height=\"974\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Fluid-and-Viscous.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Viscous and Fluid + Rigid, Elastic, and Plastic\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Fluid-and-Viscous.webp 1736w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Fluid-and-Viscous-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Fluid-and-Viscous-1024x575.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Fluid-and-Viscous-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Fluid-and-Viscous-1536x862.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Fluid-and-Viscous-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Fluid-and-Viscous-624x350.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Fluid-and-Viscous-600x337.webp 600w\" sizes=\"auto, (max-width: 1736px) 100vw, 1736px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/viscous-and-fluid-rigid-elastic-and-plastic\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/viscous-and-fluid-rigid-elastic-and-plastic\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tViscous and Fluid + Rigid, Elastic, and Plastic\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nWhat makes some solids squishy and some liquids sticky?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-33028\" class=\"post post-33028 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-upper-elementary ld_course_category-erosion\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/coastal-erosion-and-ocean-weathering\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1736\" height=\"974\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Coastal-Erosion-and-Ocean-Weathering.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Coastal Erosion and Ocean Weathering\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Coastal-Erosion-and-Ocean-Weathering.webp 1736w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Coastal-Erosion-and-Ocean-Weathering-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Coastal-Erosion-and-Ocean-Weathering-1024x575.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Coastal-Erosion-and-Ocean-Weathering-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Coastal-Erosion-and-Ocean-Weathering-1536x862.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Coastal-Erosion-and-Ocean-Weathering-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Coastal-Erosion-and-Ocean-Weathering-624x350.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Coastal-Erosion-and-Ocean-Weathering-600x337.webp 600w\" sizes=\"auto, (max-width: 1736px) 100vw, 1736px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/coastal-erosion-and-ocean-weathering\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/coastal-erosion-and-ocean-weathering\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tCoastal Erosion and Ocean Weathering\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Upper Elementary<\/strong><br \/>\nWhat do sand, sea glass, and peninsulas have in common?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-29639\" class=\"post post-29639 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-lower-elementary ld_course_category-work-of-water\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/more-river-features\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1734\" height=\"970\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/More-River-Features-img.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"More River Features\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/More-River-Features-img.webp 1734w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/More-River-Features-img-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/More-River-Features-img-1024x573.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/More-River-Features-img-768x430.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/More-River-Features-img-1536x859.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/More-River-Features-img-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/More-River-Features-img-624x349.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/More-River-Features-img-600x336.webp 600w\" sizes=\"auto, (max-width: 1734px) 100vw, 1734px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/more-river-features\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/more-river-features\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tMore River Features\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nWhat do canyons and waterfalls have in common?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-37420\" class=\"post post-37420 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-upper-elementary ld_course_category-erosion\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/how-to-crack-a-boulder\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1592\" height=\"892\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/How-to-Crack-a-Boulder-featured.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"How to Crack a Boulder\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/How-to-Crack-a-Boulder-featured.webp 1592w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/How-to-Crack-a-Boulder-featured-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/How-to-Crack-a-Boulder-featured-1024x574.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/How-to-Crack-a-Boulder-featured-768x430.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/How-to-Crack-a-Boulder-featured-1536x861.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/How-to-Crack-a-Boulder-featured-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/How-to-Crack-a-Boulder-featured-624x350.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/How-to-Crack-a-Boulder-featured-600x336.webp 600w\" sizes=\"auto, (max-width: 1592px) 100vw, 1592px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/how-to-crack-a-boulder\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/how-to-crack-a-boulder\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tHow to Crack a Boulder\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Upper Elementary<\/strong><br \/>\nWhat could be strong enough to crack a boulder?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-11097\" class=\"post post-11097 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry category-montessori-foundations-physical-science ld_course_category-earth-the-sun-and-our-solar-system ld_course_category-upper-elementary\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/earths-axis-tilt\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"2500\" height=\"1369\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Earths-Axis-Tilt.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Earth&#039;s Axis Tilt\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Earths-Axis-Tilt.webp 2500w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Earths-Axis-Tilt-300x164.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Earths-Axis-Tilt-1024x561.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Earths-Axis-Tilt-768x421.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Earths-Axis-Tilt-1536x841.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Earths-Axis-Tilt-2048x1121.webp 2048w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Earths-Axis-Tilt-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Earths-Axis-Tilt-624x342.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/12\/Earths-Axis-Tilt-600x329.webp 600w\" sizes=\"auto, (max-width: 2500px) 100vw, 2500px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/earths-axis-tilt\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/earths-axis-tilt\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tEarth&#039;s Axis Tilt\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Upper Elementary<\/strong><br \/>\nWhy does it get darker earlier during the winter? Why is it colder?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-11099\" class=\"post post-11099 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry category-montessori-foundations-physical-science ld_course_category-upper-elementary ld_course_category-geology\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/effects-of-moving-tectonic-plates\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"505\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/11\/Effects-of-Moving-Tectonic-Plates-Featured-Image.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Effects of Moving Tectonic Plates\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/11\/Effects-of-Moving-Tectonic-Plates-Featured-Image.webp 900w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/11\/Effects-of-Moving-Tectonic-Plates-Featured-Image-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/11\/Effects-of-Moving-Tectonic-Plates-Featured-Image-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/11\/Effects-of-Moving-Tectonic-Plates-Featured-Image-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/11\/Effects-of-Moving-Tectonic-Plates-Featured-Image-600x337.webp 600w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/effects-of-moving-tectonic-plates\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/effects-of-moving-tectonic-plates\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tEffects of Moving Tectonic Plates\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Upper Elementary<\/strong><br \/>\nWhat makes the ground shake during an Earthquake?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-11557\" class=\"post post-11557 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry category-montessori-foundations-physical-science ld_course_category-lower-elementary ld_course_category-properties-of-matter\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/density\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"505\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/11\/Density-and-Liquids-Featured-Image.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Density\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/11\/Density-and-Liquids-Featured-Image.webp 900w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/11\/Density-and-Liquids-Featured-Image-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/11\/Density-and-Liquids-Featured-Image-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/11\/Density-and-Liquids-Featured-Image-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/11\/Density-and-Liquids-Featured-Image-600x337.webp 600w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/density\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/density\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tDensity\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Lower Elementary<\/strong><br \/>\nWhy do some things float while other things sink?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-30134\" class=\"post post-30134 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-upper-elementary ld_course_category-erosion\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/sedimentation\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"563\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/11\/Sedimentation-Featured-Image.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Sedimentation\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/11\/Sedimentation-Featured-Image.webp 1000w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/11\/Sedimentation-Featured-Image-300x169.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/11\/Sedimentation-Featured-Image-768x432.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/11\/Sedimentation-Featured-Image-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/11\/Sedimentation-Featured-Image-600x338.webp 600w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/sedimentation\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/sedimentation\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tSedimentation\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Upper Elementary<\/strong><br \/>\nWhy do some mountains have colorful stripes on them?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-11562\" class=\"post post-11562 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry category-montessori-foundations-physical-science ld_course_category-upper-elementary ld_course_category-properties-of-matter\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/air-pressure\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1736\" height=\"974\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/11\/Air-Pressure.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"Air Pressure\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/11\/Air-Pressure.webp 1736w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/11\/Air-Pressure-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/11\/Air-Pressure-1024x575.webp 1024w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/11\/Air-Pressure-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/11\/Air-Pressure-1536x862.webp 1536w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/11\/Air-Pressure-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/11\/Air-Pressure-624x350.webp 624w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/11\/Air-Pressure-600x337.webp 600w\" sizes=\"auto, (max-width: 1736px) 100vw, 1736px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/air-pressure\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/air-pressure\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tAir Pressure\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Upper Elementary<\/strong><br \/>\nIf you put a balloon in the freezer, what do you think will happen?<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t\t\t<div class=\"item grid-2\">\n\t<article id=\"post-41062\" class=\"post post-41062 sfwd-courses type-sfwd-courses status-publish has-post-thumbnail hentry ld_course_category-free ld_course_category-teacher-tools\">\n\t\t\t\t\t<div class=\"thumbnail\">\n\t\t\t\t\t\t\t\t\t<div class=\"ribbon free\">\n\t\t\t\t\t\tFree\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"image\">\n\t\t\t\t\t\t<a\n\t\t\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\t\t\thref=\"https:\/\/learnlibre.com\/es\/lessons\/teacher-tools\/\"\n\t\t\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t\t\t>\n\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"505\" src=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/01\/Quick-Guide-for-Educators-Featured-Img.webp\" class=\"attachment-course-thumbnail size-course-thumbnail wp-post-image\" alt=\"A Quick Guide for Educators\" srcset=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/01\/Quick-Guide-for-Educators-Featured-Img.webp 900w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/01\/Quick-Guide-for-Educators-Featured-Img-300x168.webp 300w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/01\/Quick-Guide-for-Educators-Featured-Img-768x431.webp 768w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/01\/Quick-Guide-for-Educators-Featured-Img-18x10.webp 18w, https:\/\/learnlibre.com\/wp-content\/uploads\/2021\/01\/Quick-Guide-for-Educators-Featured-Img-600x337.webp 600w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/>\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t<div\n\t\t\t\t\taria-hidden=\"true\"\n\t\t\t\t\tclass=\"arrow button\"\n\t\t\t\t\ttabindex=\"-1\"\n\t\t\t\t>\n\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/teacher-tools\/\">\n\t\t\t\t\t\t<span class=\"dashicons dashicons-arrow-right-alt2\"><\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<h3 class=\"entry-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/learnlibre.com\/es\/lessons\/teacher-tools\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\tA Quick Guide for Educators\t\t\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t<\/h3>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t<p><strong>Teacher Tools<\/strong><br \/>\nA 5-minute tutorial on how to use Learn Libre lessons.<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/article>\n<\/div>\n\t<\/div>\n<\/div><\/div><!-- ld-course-grid gutenberg block end --><\/div><\/div>\n\n<\/div><\/div><\/div><\/div>\n\n<\/div><\/div>\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Big-picture science lessons We add new lessons every month<\/p>","protected":false},"author":100,"featured_media":45605,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_kad_post_transparent":"default","_kad_post_title":"hide","_kad_post_layout":"fullwidth","_kad_post_sidebar_id":"","_kad_post_content_style":"unboxed","_kad_post_vertical_padding":"hide","_kad_post_feature":"hide","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"class_list":["post-16561","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Lessons - Learn Libre<\/title>\n<meta name=\"description\" content=\"Lessons are grouped into sequences aligned with the topics in the Montessori albums, or build on and go beyond the album teachings.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/learnlibre.com\/es\/lessons\/\" \/>\n<meta property=\"og:locale\" content=\"es_MX\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Lessons - Learn Libre\" \/>\n<meta property=\"og:description\" content=\"Lessons are grouped into sequences aligned with the topics in the Montessori albums, or build on and go beyond the album teachings.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/learnlibre.com\/es\/lessons\/\" \/>\n<meta property=\"og:site_name\" content=\"Learn Libre\" \/>\n<meta property=\"article:modified_time\" content=\"2025-05-27T16:03:20+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/learnlibre.com\/wp-content\/uploads\/2024\/04\/Profile-Learn-Libre.png\" \/>\n\t<meta property=\"og:image:width\" content=\"512\" \/>\n\t<meta property=\"og:image:height\" content=\"512\" \/>\n\t<meta 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