Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.

If you're seeing this message, it means we're having trouble loading external resources on our website. If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Join Khan Academy and learn with us Log in to Khan Academy to get started!

Khan Academy's mission is to provide free, world-class education for anyone, anywhere.

Join Khan Academy to activate your learning Log in to Khan Academy to get started!

2021年9月20日 · Learning at Khan Academy is always free! All of Khan Academy’s library of trusted, standards-aligned videos, articles, practice questions, and lessons are completely free for anyone who wants to us...

Download videos for offline viewing, bookmark content to learn later, and complete class assignments on Khan Academy.

Get Khan Academy tips, tricks, and help from your fellow community members

2025年1月21日 · The power of gamified learning. Gamified learning isn’t just fun—it’s a proven strategy for enhancing education. Research shows that incorporating play and gaming elements into lessons leads to the following: . Improved grades: Students are more motivated and retain information better when learning is enjoyable.; Higher attendance: Engaging activities make …

Prepare for the digital SAT with Khan Academy's free resources, practice tests, and personalized study plans.