New exercises and videos from Khan Academy 2026-07-03T06:45:56.000000 https://www.khanacademy.org/feed/combined Khan Academy http://khanacademy.org info@khanacademy.org 2026-07-02T21:40:42.710417 equal-and-equivalent-expressions Learn how to simplify expressions and use that skill to figure out when two expressions are always, sometimes, or never equal. We'll work through examples of each case together so we can build a solid understanding of what it really means for two expressions to be equivalent! <br><br> <div class="player-container"> <iframe id="mainVideoPlayer" class="player" title="Video" type="text/html" width="800" height="480" data-youtubeid="orsTliP9CU8" src="https://www.youtube.com/embed/orsTliP9CU8?hl=en&cc_lang_pref=en&enablejsapi=1&html5=1&wmode=transparent&modestbranding=1&rel=0&fs=1&showinfo=1&iv_load_policy=1" frameborder="0" allowfullscreen webkitallowfullscreen mozallowfullscreen ></iframe> </div> 2026-07-02T21:40:42.710417 modeling-distance-over-time Learn how to model the relationship between distance and time using three different representations: an equation, a table, and a graph. We'll work through each part of a real problem together and explore how all three representations connect to tell the same story about distance and time! <br><br> <div class="player-container"> <iframe id="mainVideoPlayer" class="player" title="Video" type="text/html" width="800" height="480" data-youtubeid="e6u9VT4d_vY" src="https://www.youtube.com/embed/e6u9VT4d_vY?hl=en&cc_lang_pref=en&enablejsapi=1&html5=1&wmode=transparent&modestbranding=1&rel=0&fs=1&showinfo=1&iv_load_policy=1" frameborder="0" allowfullscreen webkitallowfullscreen mozallowfullscreen ></iframe> </div> 2026-07-02T21:40:42.710417 identifying-equations-from-visual-models-tape-diagrams Learn how to read tape diagrams and translate what we see into one-step equations using variables. We'll work through two examples together, practice writing the equations they represent, and then solve for the unknown to check that our answer makes sense! <br><br> <div class="player-container"> <iframe id="mainVideoPlayer" class="player" title="Video" type="text/html" width="800" height="480" data-youtubeid="8mrF81QZVF4" src="https://www.youtube.com/embed/8mrF81QZVF4?hl=en&cc_lang_pref=en&enablejsapi=1&html5=1&wmode=transparent&modestbranding=1&rel=0&fs=1&showinfo=1&iv_load_policy=1" frameborder="0" allowfullscreen webkitallowfullscreen mozallowfullscreen ></iframe> </div> 2026-07-02T12:10:59.912898 functions-of-stem-leaf-and-roots-in-transport-of-water-in-plants-introductory Functions of Stem, Leaf and Roots in Transport of Water in Plants - Introductory <br><br> <div class="player-container"> <iframe id="mainVideoPlayer" class="player" title="Video" type="text/html" width="800" height="480" data-youtubeid="A11JvQ0Emnw" src="https://www.youtube.com/embed/A11JvQ0Emnw?hl=en&cc_lang_pref=en&enablejsapi=1&html5=1&wmode=transparent&modestbranding=1&rel=0&fs=1&showinfo=1&iv_load_policy=1" frameborder="0" allowfullscreen webkitallowfullscreen mozallowfullscreen ></iframe> </div> 2026-07-02T12:10:59.912898 different-types-of-forces Different Types of Forces <br><br> <div class="player-container"> <iframe id="mainVideoPlayer" class="player" title="Video" type="text/html" width="800" height="480" data-youtubeid="ojuo-tSHzQY" src="https://www.youtube.com/embed/ojuo-tSHzQY?hl=en&cc_lang_pref=en&enablejsapi=1&html5=1&wmode=transparent&modestbranding=1&rel=0&fs=1&showinfo=1&iv_load_policy=1" frameborder="0" allowfullscreen webkitallowfullscreen mozallowfullscreen ></iframe> </div> 2026-07-02T12:10:59.912898 uses-of-different-types-of-forces Uses of Different Types of Forces <br><br> <div class="player-container"> <iframe id="mainVideoPlayer" class="player" title="Video" type="text/html" width="800" height="480" data-youtubeid="XmAFt_OTmFE" src="https://www.youtube.com/embed/XmAFt_OTmFE?hl=en&cc_lang_pref=en&enablejsapi=1&html5=1&wmode=transparent&modestbranding=1&rel=0&fs=1&showinfo=1&iv_load_policy=1" frameborder="0" allowfullscreen webkitallowfullscreen mozallowfullscreen ></iframe> </div> 2026-07-02T12:10:59.912898 natural-resources-introductory Natural Resources - Introductory <br><br> <div class="player-container"> <iframe id="mainVideoPlayer" class="player" title="Video" type="text/html" width="800" height="480" data-youtubeid="ZOmQmZCZu2g" src="https://www.youtube.com/embed/ZOmQmZCZu2g?hl=en&cc_lang_pref=en&enablejsapi=1&html5=1&wmode=transparent&modestbranding=1&rel=0&fs=1&showinfo=1&iv_load_policy=1" frameborder="0" allowfullscreen webkitallowfullscreen mozallowfullscreen ></iframe> </div> 2026-07-02T12:10:59.912898 soft-and-loud-sounds Soft and Loud Sounds <br><br> <div class="player-container"> <iframe id="mainVideoPlayer" class="player" title="Video" type="text/html" width="800" height="480" data-youtubeid="xA2ZESKgXhc" src="https://www.youtube.com/embed/xA2ZESKgXhc?hl=en&cc_lang_pref=en&enablejsapi=1&html5=1&wmode=transparent&modestbranding=1&rel=0&fs=1&showinfo=1&iv_load_policy=1" frameborder="0" allowfullscreen webkitallowfullscreen mozallowfullscreen ></iframe> </div> 2026-07-02T12:10:59.912898 using-a-plumb-line-to-install-a-flagpole Using a Plumb Line to Install a Flagpole <br><br> <div class="player-container"> <iframe id="mainVideoPlayer" class="player" title="Video" type="text/html" width="800" height="480" data-youtubeid="whDQYkB2X_I" src="https://www.youtube.com/embed/whDQYkB2X_I?hl=en&cc_lang_pref=en&enablejsapi=1&html5=1&wmode=transparent&modestbranding=1&rel=0&fs=1&showinfo=1&iv_load_policy=1" frameborder="0" allowfullscreen webkitallowfullscreen mozallowfullscreen ></iframe> </div> 2026-07-02T12:10:59.912898 what-do-plants-need-for-life-and-growth What do Plants need for Life and Growth? <br><br> <div class="player-container"> <iframe id="mainVideoPlayer" class="player" title="Video" type="text/html" width="800" height="480" data-youtubeid="mDUw8iGGWlc" src="https://www.youtube.com/embed/mDUw8iGGWlc?hl=en&cc_lang_pref=en&enablejsapi=1&html5=1&wmode=transparent&modestbranding=1&rel=0&fs=1&showinfo=1&iv_load_policy=1" frameborder="0" allowfullscreen webkitallowfullscreen mozallowfullscreen ></iframe> </div> 2026-07-02T12:10:59.912898 behavioural-adaptations-of-animals-introductory Behavioural Adaptations of Animals - Introductory <br><br> <div class="player-container"> <iframe id="mainVideoPlayer" class="player" title="Video" type="text/html" width="800" height="480" data-youtubeid="s6cGbPsVU68" src="https://www.youtube.com/embed/s6cGbPsVU68?hl=en&cc_lang_pref=en&enablejsapi=1&html5=1&wmode=transparent&modestbranding=1&rel=0&fs=1&showinfo=1&iv_load_policy=1" frameborder="0" allowfullscreen webkitallowfullscreen mozallowfullscreen ></iframe> </div> 2026-07-02T12:10:59.912898 transfer-of-heat Transfer of Heat <br><br> <div class="player-container"> <iframe id="mainVideoPlayer" class="player" title="Video" type="text/html" width="800" height="480" data-youtubeid="C6pP0DXr91s" src="https://www.youtube.com/embed/C6pP0DXr91s?hl=en&cc_lang_pref=en&enablejsapi=1&html5=1&wmode=transparent&modestbranding=1&rel=0&fs=1&showinfo=1&iv_load_policy=1" frameborder="0" allowfullscreen webkitallowfullscreen mozallowfullscreen ></iframe> </div> 2026-07-02T12:10:59.912898 characteristics-of-living-organisms Characteristics of Living Organisms <br><br> <div class="player-container"> <iframe id="mainVideoPlayer" class="player" title="Video" type="text/html" width="800" height="480" data-youtubeid="efTI7o6vzrs" src="https://www.youtube.com/embed/efTI7o6vzrs?hl=en&cc_lang_pref=en&enablejsapi=1&html5=1&wmode=transparent&modestbranding=1&rel=0&fs=1&showinfo=1&iv_load_policy=1" frameborder="0" allowfullscreen webkitallowfullscreen mozallowfullscreen ></iframe> </div> 2026-07-02T12:10:59.912898 physical-properties-of-metals-introductory Properties of Metals - Introductory <br><br> <div class="player-container"> <iframe id="mainVideoPlayer" class="player" title="Video" type="text/html" width="800" height="480" data-youtubeid="BTBFQctRFoE" src="https://www.youtube.com/embed/BTBFQctRFoE?hl=en&cc_lang_pref=en&enablejsapi=1&html5=1&wmode=transparent&modestbranding=1&rel=0&fs=1&showinfo=1&iv_load_policy=1" frameborder="0" allowfullscreen webkitallowfullscreen mozallowfullscreen ></iframe> </div> 2026-07-02T12:10:59.912898 flowering-and-non-flowering-plants-basic Flowering and Non-Flowering Plants <br><br> <div class="player-container"> <iframe id="mainVideoPlayer" class="player" title="Video" type="text/html" width="800" height="480" data-youtubeid="WrupylmyF1g" src="https://www.youtube.com/embed/WrupylmyF1g?hl=en&cc_lang_pref=en&enablejsapi=1&html5=1&wmode=transparent&modestbranding=1&rel=0&fs=1&showinfo=1&iv_load_policy=1" frameborder="0" allowfullscreen webkitallowfullscreen mozallowfullscreen ></iframe> </div> 2026-07-02T12:10:59.912898 instruments-for-measuring-temperature Instruments for Measuring Temperature <br><br> <div class="player-container"> <iframe id="mainVideoPlayer" class="player" title="Video" type="text/html" width="800" height="480" data-youtubeid="DXIhtX7wHQE" src="https://www.youtube.com/embed/DXIhtX7wHQE?hl=en&cc_lang_pref=en&enablejsapi=1&html5=1&wmode=transparent&modestbranding=1&rel=0&fs=1&showinfo=1&iv_load_policy=1" frameborder="0" allowfullscreen webkitallowfullscreen mozallowfullscreen ></iframe> </div> 2026-07-02T12:10:59.912898 resources-of-earth-land-water-and-air Resources of Earth: Land, Water and Air <br><br> <div class="player-container"> <iframe id="mainVideoPlayer" class="player" title="Video" type="text/html" width="800" height="480" data-youtubeid="HUTyEtYPcrc" src="https://www.youtube.com/embed/HUTyEtYPcrc?hl=en&cc_lang_pref=en&enablejsapi=1&html5=1&wmode=transparent&modestbranding=1&rel=0&fs=1&showinfo=1&iv_load_policy=1" frameborder="0" allowfullscreen webkitallowfullscreen mozallowfullscreen ></iframe> </div> 2026-07-02T12:10:59.912898 effect-of-multiple-forces-acting-on-an-object Effect of Multiple Forces acting on an Object <br><br> <div class="player-container"> <iframe id="mainVideoPlayer" class="player" title="Video" type="text/html" width="800" height="480" data-youtubeid="gHPhs6amhrE" src="https://www.youtube.com/embed/gHPhs6amhrE?hl=en&cc_lang_pref=en&enablejsapi=1&html5=1&wmode=transparent&modestbranding=1&rel=0&fs=1&showinfo=1&iv_load_policy=1" frameborder="0" allowfullscreen webkitallowfullscreen mozallowfullscreen ></iframe> </div> 2026-07-02T12:10:59.912898 vibrations-and-sound Vibrations and Sound <br><br> <div class="player-container"> <iframe id="mainVideoPlayer" class="player" title="Video" type="text/html" width="800" height="480" data-youtubeid="rIemfzILHcg" src="https://www.youtube.com/embed/rIemfzILHcg?hl=en&cc_lang_pref=en&enablejsapi=1&html5=1&wmode=transparent&modestbranding=1&rel=0&fs=1&showinfo=1&iv_load_policy=1" frameborder="0" allowfullscreen webkitallowfullscreen mozallowfullscreen ></iframe> </div> 2026-07-02T12:10:59.912898 requirements-for-seed-germination-introductory Requirements for Seed Germination - Introductory <br><br> <div class="player-container"> <iframe id="mainVideoPlayer" class="player" title="Video" type="text/html" width="800" height="480" data-youtubeid="ozJAY3AjYvA" src="https://www.youtube.com/embed/ozJAY3AjYvA?hl=en&cc_lang_pref=en&enablejsapi=1&html5=1&wmode=transparent&modestbranding=1&rel=0&fs=1&showinfo=1&iv_load_policy=1" frameborder="0" allowfullscreen webkitallowfullscreen mozallowfullscreen ></iframe> </div> 2026-07-03T06:45:56.000000 position-maps-and-grids In this exercise students will learn how to read Pictorial Maps using direction and distances; and Locating Objects on a Grid using Columns and Rows. Khan Academy 2026-07-03T06:40:59.000000 correlation-between-addition-and-subtraction In this exercise students solidify their understanding that subtraction is the direct reverse operation of addition. Khan Academy 2026-07-03T06:35:27.000000 the-world-of-numbers-chapter-end-challenges Chapter end challenges from textbook for the chapter - The World of Numbers Khan Academy 2026-07-03T04:41:19.000000 general-statement-for-hcf-and-lcm In this exercise, students will master the "Power of Generalisation" by moving beyond specific numbers to understand universal mathematical laws; they will learn to derive general identities for HCF and LCM, explore how co-prime and consecutive numbers behave, and discover how scaling numbers impacts their common factors and multiples. Khan Academy 2026-07-02T20:37:03.000000 inferences-foundations Inferences: foundations Corey 2026-07-02T20:34:51.000000 central-ideas-and-details-foundations Central ideas and details: foundations Corey 2026-07-02T20:31:30.000000 command-of-quantitative-evidence-foundations Command of quantitative evidence: foundations Corey 2026-07-02T20:26:26.000000 command-of-textual-evidence-foundations Command of textual evidence: foundations Corey 2026-07-02T20:02:11.000000 words-in-context-foundations Words in context: foundations Corey 2026-07-02T19:06:28.000000 exponent_rules Rewrite products or quotients of powers, including negative powers. Tomer Gal 2026-07-02T18:15:40.000000 identify-and-solve-equations-from-visual-models Identify the equation represented by a tape diagram. Then, solve for the unknown in the equation. Lindsay 2026-07-02T17:58:28.000000 equal-and-equivalent-expressions Let’s simplify expressions to see when two expressions are equal. We’ll carefully consider which values would make each equation work! Lafeesah 2026-07-02T17:47:33.000000 model-distance-over-time Model relationships between distance and time by writing equations from tables and graphs. Lafeesah 2026-07-02T16:18:55.000000 square_roots Practice finding the square root of a perfect square positive integer. Jeff Ruberg 2026-07-02T15:09:48.000000 analyze-functions-calculator-active Analyze the behavior of graphs of functions using a graphing calculator and your knowledge about derivatives. Tomer Gal 2026-07-02T14:08:01.000000 understand-artificial-selection-tx7 Check your understanding of artificial selection in this set of free, standards-aligned practice questions. Mariah Eisman 2026-07-02T12:06:34.000000 types-of-human-teeth-and-their-functions This exercise helps students identify the four types of human teeth and understand their main roles in digesting food. It also connects these functions to animals. Sumera Anjum 2026-07-02T12:04:29.000000 causes-and-prevention-of-tooth-decay-and-gum-disease This exercise helps students build conceptual understanding and daily health habits by distinguishing between tooth decay and gum diseases using text and visual cues. Sumera Anjum 2026-07-02T12:02:58.000000 first-aid-box This exercise helps students recognize basic items in a first aid box and understand their immediate uses. Sumera Anjum 2026-07-02T12:01:30.000000 understanding-reproduction-in-flowering-plants-from-pollination-to-seed-dispersal This exercise develops a sequential understanding of the reproductive life cycle of flowering plants, from pollination to seed dispersal. It links observable features, such as flowers, fruits, and seed movement, with internal processes, including pollen tube growth, fertilization, and seed development. Learners identify types of pollination, explain the sequence of fertilization, examine the basic structure of seeds, and describe adaptations for seed dispersal. The exercise also addresses common misconceptions about pollen transfer and fruit formation, promoting an accurate conceptual understanding of plant reproduction. Sumera Anjum