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Khan Academy is a nonprofit providing a free, world-class education for anyone, anywhere. Our interactive practice problems, articles, and videos help students succeed in math, biology, chemistry, physics, history, economics, finance, grammar, and many other topics. Khan Academy provides teachers with data on how their students are doing so they can identify gaps in learning and provide tailored instruction. We also offer free personalized SAT and LSAT practice in partnership with the College Board and the Law School Admission Council. Our resources have been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy each month. Want to extend your learning beyond YouTube? Practice what you've just discovered for free: www.khanacademy.org
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