MIT OpenCourseWare

I found MIT OpenCourseWare (OCW) the other day on YouTube.
I was watching the Tetris wall made by some MIT "bored" students, and I then saw some movies of lectures on MIT, since then I've been watching lectures from "MIT 6.00 Introduction to Computer Science and Programming", it's pretty cool, despite not being at MIT (yet) I can take some lectures, and the OCW's website as lots of free materials.

Here is the first video lesson from 6.00 (class not the number of videos xD).

And the Tetris is HERE.