saw this on 60 min sunday. seems to be effective. http://www.cbsnews.com/video/watch/?id=7401696n&tag=mg;mostpopvideo http://www.youtube.com/user/khanacademy?feature=watch Khan Academy: The future of education? March 11, 2012 4:02 PM With the backing of Gates and Google, Khan Academy and its free online educational videos are moving into the classroom and across the world. Their goal: to revolutionize how we teach and learn. Sanjay Gupta reports.