NASA has a great web site with flash videos of the Constellation program. This program is the basis for NASA's return to the moon and eventual manned missions to Mars.
The site has some great flash videos and resources about the program and was very interesting.
More information for educators is available HERE.
I plan to use this next year as a way to introduce space into my Physics class, and then use it to keep the students interested. I'm hoping that the space program resources that NASA has will also keep my students engaged in physics as they see some of the applications of the physics concepts.