Here are some more additions to The Best Sites To Learn About The Gulf Oil Spill:

Spill Effects Underwater is a NY Times graphic.

U.S. Oil Spill explained is an excellent animation from Al Jazeera English. Unfortunately, though, it’s hosted on YouTube, so may not be accessible to schools.

Animation of Oil-Spill Cleanup Methods is a video from The Wall Street Journal.

The Chicago Tribune has a ton of resources on the spill, including many graphics (scroll down to the bottom of the page).