MIT OpenCourseWare and Khan Academy offer a range of courses and supplemental material to help viewers learn about the topics they discuss. Khan Academy has partnerships with a number of institutions, including NASA and the California Academy of Sciences.
Videos hosted on Khan Academy tend to be short, generally under 10 minutes, and focus on a single subject, which grants viewers flexibility. MIT OpenCourseWare, on the other hand, streams content primarily taken from undergraduate MIT lectures. As a result, video lengths tend to be longer. The website also provides reading lists students taking courses can use in addition to a number of Internet-based demonstrations and tools.