Sal Kahn was just on Nightline a few days ago. I like this piece as it is short and hits all the highlights. The main point is that technology can greatly enhance the classroom by using short videos (mine are now all under eight minutes) and then letting the students work on projects or webquests. I spend most of the class either working with students who are behind or walking around and checking in on the students who are up to date. I still haven't reached my own goal which will let students work on a self paced class.