Sunday, August 5, 2012

How well does Khan Academy teach? - The Answer Sheet - The Washington Post



http://www.washingtonpost.com/blogs/answer-sheet/post/how-well-does-khan-academy-teach/2012/07/25/gJQA9bWEAX_blog.html August 05, 2012 at 03:18PM via Diigo flipped, KhanAcademy

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