Turns out that MIT has been putting complete courses online for anyone to use for years now. There are 1900 classes and more being added all the time. If you want a college education, you have to look no further than here (at least as a launching point). Course List: http://ocw.mit.edu/OcwWeb/web/courses/courses/index.htm
You get your standard Chem 101 kinds of classes, of course, but also these:
Costume Design and Construction: http://ocw.mit.edu/OcwWeb/Music-and-Theater-Arts/21M-732Fall-2008/CourseHome/index.htm
Chemistry of Sports: http://ocw.mit.edu/OcwWeb/Special-Programs/SP-235Spring-2009/CourseHome/index.htm
Physics of Rock Climbing: http://ocw.mit.edu/OcwWeb/Special-Programs/SP-255Spring-2006/CourseHome/index.htm
Kitchen Chemistry: http://ocw.mit.edu/OcwWeb/Special-Programs/SP-287Spring-2009/CourseHome/index.htm
Wheelchair design in Developing Countries: http://ocw.mit.edu/OcwWeb/Special-Programs/SP-784Spring-2009/CourseHome/index.htm
Cultural Performances of Asia: http://ocw.mit.edu/OcwWeb/Foreign-Languages-and-Literatures/21F-067JFall-2005/CourseHome/index.htm
Anthropology of Computing: http://ocw.mit.edu/OcwWeb/Anthropology/21A-350JFall-2004/CourseHome/index.htm
Ancient Philosophy and Math: http://ocw.mit.edu/OcwWeb/Special-Programs/SP-2H3Fall-2006/CourseHome/index.htm
and Lego Robotics: http://ocw.mit.edu/OcwWeb/Special-Programs/SP-293Spring-2007/CourseHome/index.htm
And more coming all the time.
Oh, and there are more in the archive: http://ocw.mit.edu/OcwWeb/web/courses/archived/index.htm
and there are high school courses, science movies, AP materials, and more and more. I could spend years here just soaking it all up. And I might. Always wanted more classes in science without the worry of grades.....
Oh, wait. There's more. MIT isn't the only school that does it: