Some of the Best Space Websites
NASA and other National Space Agency Websites
Space Mission Webpages
Other Space Related Websites
Space Education Websites
Here's the mainpage for NASA Education.
NASA Space Maths problems. Loads of great activities here.
Here's the mainpage for NASA Space Place, another NASA education site.
Comprehensive guide to mechanics behind spaceflight by NASA JPL. Includes questions, images and lots more besides.
Some nice engineering projects to try with students.
Wikipedia pages with fastfacts on:
Link to loads of short space videos to download.