MIT公开课的更多信息:

1. http://ocw.mit.edu/OcwWeb/web/courses/courses/index.htm
most visited course:
http://ocw.mit.edu/courses/most-visited-courses/

2. https://www.edx.org/

 open course youtube 版：
3. http://www.youtube.com/user/MIT

4. http://www.openculture.com/freeonlinecourses