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A personalized learning resource for all ages With practice exercises, instructional videos, and a personalized learning dashboard, Khan Academy empowers learners to study at their own pace, …

Physics the study of matter, motion, energy, and force.

Grammar is the collection of rules and conventions of a language. Whether you're learning English for the first time or just looking to improve your speaking and writing skills, this course is your …

Explore science with Khan Academy's free courses, videos, and exercises in physics, chemistry, biology, and more for a world-class education.

A growing body of research indicates Khan Academy drives learning outcomes. Learn how our platform drives results that surpass typical growth expectations.

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 …