Over at Forbes on my Parentonomics blog I recount the experience my 11 year old son had taking Stanford’s Game Theory course. My take-a-away is that designing online content and also assessment is a real challenge and it is unlikely that normal course content will simply translate over to the new medium.
Competition in the Digital Age
Digitopoly 
Thanks for the Forbes essay.
Here’s an interesting critique of the Khan Academy approach:
https://fnoschese.wordpress.com/2011/03/17/khan-academy-and-the-effectiveness-of-science-videos/