Mini-Movies for Your SmartBoard
http://www.misterteacher.com/minimovies/minimovies.html

"mini movies" that you can download - and guess what, they have the .swf extension on them. Which of course means that you can right-click on them to download. Then open up Notebook and click on "Insert" and "Flash File". Browse to where you downloaded the movie. Now the little movie will play right off of the Notebook page for you.

Short, free, dynamic video clips to show a variety of math (mostly algebra and geometry) concepts. A good supporting resource.