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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 — ...

Windows/Mac/Linux: Khan Academy is pretty useful for learning about computer science, math, and many other subjects. If you'd rather learn without being tied to an internet connection, KA Lite allows ...

Proponents see the tools as a way to automatically customize academic support. They could also make children test subjects for A.I. experiments. By Natasha Singer Natasha Singer, who covers education ...