WebMD
Web Md: Depression Guide
This site from WebMD Health provides great information on depression. Includes a section on the facts of depression, types of depression, causes, diagnosis, treatment options, care giving, and different populations information.
Science Education Resource Center at Carleton College
Serc: Conservation of Energy of While Rolling Down a Hill
A real-life example of a ball rolling down a ramp to see whether mechanical energy really is conserved when objects roll down hills. Students analyze video clips of children rolling down a driveway on roller blades and various bikes and...