From a tiny closet in Mountain View, Sal Khan is educating the globe for free. His 1,516 videotaped mini-lectures — on topics ranging from simple addition to vector calculus and Napoleonic campaigns — ...
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Study links limited Khan Academy use to math gains
A large-scale study of over 200,000 U.S. students found that even minimal annual use of Khan Academy’s mastery-based math program correlated with measurable test score improvements. Researchers noted ...
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