It doesn’t matter if you’re a veteran teacher or a newbie just now taking college courses — finding new ways to get students engaged in the classroom is always a great thing. One way many teachers are reaching out is with the multitude of material found on the web, allowing them to turn everyday lessons into a multimedia experience. You can find a great amount of helpful material on these sites, including videos to augment your lessons, lectures to inspire students, documentaries to show them how things work, and loads of additional videos to help you become a better, smarter teacher.
http://theinnovativeeducator.blogspot.com/2010/02/100-video-sites-every-educator-should.html