Claire Mathieu has been blogging about intro math and CS videos from Khan Academy and from others:
I’ve heard about this Khan Academy, and it seems like more and more course material is appearing as tiny web videos.
Also I recently found out that there is a free, online version of the Stanford Intro AI Class taught by Peter Norvig and Sebastian Thrun, for which 56,000 students signed up. I think I accidentally did their homework.
Healthy Algorithms 
From the NY Times:
TECHNOLOGY | December 05, 2011
Grading the Digital School: Online Learning, Personalized
By SOMINI SENGUPTA
At least 36 schools nationwide are combining teacher-led lessons with computer-based lectures and exercises using a software program based on Salman Khan’s popular YouTube lessons.
http://www.nytimes.com/2011/12/05/technology/khan-academy-blends-its-youtube-approach-with-classrooms.html
The Stanford Machine Learning course is excellent, as are the Khan inspired offerings. This is the best thing to happen to education that I can recall in my lifetime.