The Tech Museum of Technology http://www.thetech.org/
How Stuff Works http://www.howstuffworks.com/
The Greatest Engineering Projects
Introduction to Bridge Building
Nasa Flight Material and Worksheets for Model Airplanes
Land Speed Record Asault Vehicle (Metric 500) (Balsa Dragster)
Team Vesco http://www.teamvesco.com/
Problem Solving Design Briefs are listed below