Physics lectures
Wandering about on the intarweb this evening I ran into the videos for Walter Lewin's classical mechanics class at MIT. I've seen short clips of his classes before on TV at various times. He goes to great lengths to illustrate basic physics in a way that few other teachers do. With a $300,000 grant he has set up an impressive set of physics lectures with fun and interesting demos all recorded and available at MIT's open courseware.
Here's the article that pointed me at his 8.01 class lectures. And
here's the listing of the videos.
Many of his other classes are available on the open courseware systems but the set of mechanics lectures that I've linked to are by far the most dramatic.
As an aside, they will all fit quite nicely on a single layer dvd.