For me the killer thing about Khan's lectures is how broken down into small chunks that they are. If you don't get it -- you can watch the 10m lecture again.

For me the killer thing about Khan's lectures is how broken down into small chunks that they are. If you don't get it -- you can watch the 10m lecture again. Not to mention you can pause/rewind, there are theoretically no distractions (like disruptive members of class), and then the point you made about lecture quality. I really like Khan's model of doing lectures/learning at home -- and using the classroom time for exercises // with the teacher (or other students) mentoring those who are stuck on a problem set.