Bang! Boing! Pop!
A tutorial on energy, linear momentum, and angular momentum, with interactive quizzes. The site also includes a glossary to help students learn physics.

Teaching Dynamics with Excel97
The material presented here is designed to be directly useful to a teacher or student in a more traditional high school or beginning university physics course on mechanics. There are profuse instructions, and some prewritten spreadsheets are available as well.

Mechanics Demonstrations
Various aspects of mechanics are explored allowing the user to change variables to learn the concepts

How Stuff Works: Force, Power, Torque and Energy
Animations for explaining the concepts of force, power, torque, and energy.