High school biology website with flash animations. Requires current Flash player.
Restriction Enzymes:
Here's a drag-and-drop animation I use in class to help teach restriction enzymes, plasmids, and recombinant DNA.

It might not be very useful to you unless you've seen me use it because there are no instructions. But if you know something about this topic already and just want to review, you might find it helpful to drag around the enzymes and pieces of DNA.