Created by experts, Khan Academy’s library of trusted, standards-aligned practice and lessons covers math K-12 through early college, grammar, science, history, AP®, SAT®, and more. It’s all free for …

In the Mongol Empire it signified the ruler of a horde (ulus), while the ruler of all the Mongols was the khagan or great khan. It is a title commonly used to signify the head of a Pashtun tribe or clan. The …

Did you know? Regardless of who you are, mastering even just one more skill on Khan Academy results in learning gains.

Learn fifth grade math—arithmetic with fractions and decimals, volume, unit conversion, graphing points, and more. This course is aligned with Common Core standards.

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Download videos for offline viewing, try our massive library of interactive exercises, bookmark things to study later, and complete assignments from your classes! Your progress stays in-sync with your …

Did you know? Regardless of who you are, mastering even just one more skill on Khan Academy results in learning gains.

In this section of Khan Academy, you'll learn about the brain-bending vastness of time and space. We go from plate tectonics here on Earth to entire galaxies and beyond. Learn about electricity, circuit …

Oct 21, 2025 · LearnStorm is Khan Academy’s free, fun, and engaging classroom tool that celebrates student progress and keeps learning joyful all year long. By mid-semester, many …

Jun 2, 2022 · Khan Academy is a not-for-profit educational organization started by Salman Khan in 2008. Our mission is to provide a free, world-class education to anyone, anywhere. Our online …