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.
Mechanics Demonstrations - Various aspects of mechanics are explored allowing the user to change variables to learn the concepts
Newton's Law of Motion - Explanation of Newton's law of motion with examples of simple calculations, Christmas songs and a couple of problems.
Perpetual Motion - Examples with animated diagrams of machines which look like they might run forever, but they do not.
Playground Physics - A curriculum plan with student worksheets and teachers' guides for upper elementary and middle school students which is designed to relate the experience children have on the playground to basic physics concepts.
Skateboard Science - The techniques and equipment skateboarders use to seemingly bend the law of gravity. In the trickscience section, the site explains the physics behind the stunts, and several experiments to try at home. The equipment section offers an in-depth look at skateboard design.
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.