From a tiny closet in Mountain View, Calif., 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 ...
That’s what the first-graders in Sue Allen’s class at Townsend Elementary School in Vandercook Lake thought of her activity designed to help them count by ones, tens and hundreds last week. Maybe ...
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