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Khan Academy, Learn almost anything—for free.

26 May

Watch. Practice. Learn almost anything—for free.

What started out as Sal making a few algebra videos for his cousins has grown to over 2,100 videos and 100 self-paced exercises and assessments covering everything from arithmetic to physics, finance, and history.

Browse the libraryorTry an exercise

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Our small team is on a mission to deliver a world-class education to anyone anywhere, and you can help. Take a second to get the word out, or read about how teachers, translators, donors, and everyone else can contribute.

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