This is an interesting story and a web site which may help your children better understand some of their problem subjects in school. Bill Gates is one of the fans.
Sal Khan at Gel 2010 (founder, the Khan Academy) from Gel Conference on Vimeo.
The web site is: http://www.khanacademy.org/
Wikipedia's explanation of Khan Academy: http://en.wikipedia.org/wiki/Khan_Academy
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