yes, Khan going in the direction of programming languages seems abstract I've been waiting for him to take the math video's and organize them in groups of specific studies say for instance all math related to algorithmic studies, specific engineering studies grouped all together like a course this seems like it would be productive to the user instead it seems as though he's beginning to jump on what's popular and add it to the site
I agree. Their exercise framework can really use much improvement and there are a ton of subjects that don't even have any exercises yet. I would like them to concentrate on math and physics for now and work on really making awesome content and exercises. They should leave the CS and programming stuff for Coursera, Udacity etc. and focus on what they are good at (which programming is not imho).
