I saw this NYT article yesterday, and I signed up for like 4 of them on Coursera. Unlike the youtube lectures/iTunes U you may be familiar with, they are starting to get these organized into fully interactive classes, with quizzes, tests, homeworks, and a grade. Some of the classes offer certificates of completion signed by the professor.http://www.nytimes.com/2012/07/17/educa ... .html?_r=3
I signed up for like 4 of these last night, the first one starts in a couple of weeks so I'll give a better impression. However, I have learned iPhone programming solely from the Stanford lectures, and have watched many other lectures in different subjects for enjoyment. This seems to be promising a more formal experience which if it lives up to it, would be amazing.
It looks like a lot of the classes on Coursera are focused on Computer Science, but UPenn has a bunch of health topics, there are some finance classes, at least one history class, a poetry class, and a math class here and there.https://www.coursera.org/courses
There are some intro to computer science/programming which would be good for people wanting to learn to program, and an intro to mathematical thought which is a transition class from high school to college mathematics which looks amazing for anyone with teenage relatives.