More than 2,200 courses available, include complete video lectures; not all of these have complete lecture notes. The videos are available in streaming mode or downloaded for viewing offline. Many video and audio files are also available from iTunes U.
MIT OpenCourseWare is a free publication of MIT course materials that reflects all the undergraduate and graduate subjects taught at MIT.
High school students and educators should check out Highlights for High School
About MIT OpenCourseWare