Free lecture notes, exams, and videos from MIT. I was overwhelmed when I first came to know this few days back. I hope it will be helpful to IOE friends if I share this with you.
This has been taken from OWC Website .

What is MIT OpenCourseWare?
MIT OpenCourseWare is a free publication of MIT course materials that reflects almost all the undergraduate and graduate subjects taught at MIT.
OCW is not an MIT education.
OCW does not grant degrees or certificates.
OCW does not provide access to MIT faculty.
Materials may not reflect entire content of the course.

To explore yourself logon to http://ocw.mit.edu/OcwWeb/web/home/home/index.htm