http://www.khanacademy.org/

There was an article about the Website and it’s ‘teacher/developer’ in Fortune Magazine. 
http://money.cnn.com/2010/08/23/technology/sal_khan_academy.fortune/index.htm

  • Over 1,600 videos
  • Non-Profit
  • Khan has a Harvard MBA, three degrees from MIT: a BS in math and a BS and a master’s in electrical engineering and computer science.
  • Gates said, “Gates touted the “unbelievable” 10- to 15-minute Khan Academy tutorials “I’ve been using with my kids.”
  • ‘In an undistinguished ranch house off the main freeway of Silicon Valley, in a converted walk-in closet filled with a few hundred dollars’ worth of video equipment and bookshelves and his toddler’s red Elmo underfoot, is the epicenter of the educational earthquake that has captivated Gates and others. It is here that Salman Khan produces online lessons on math, science, and a range of other subjects that have made him a web sensation’