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 — ...
Stanford University’s youcubed math center has released a series of free K–12 math lessons in time for the resumption of school. The Week of Inspirational Math (WiM) lesson series for teachers, ...
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