Links:

PHET - simulator - great for observing science phenomenon without equipment.

AP Physics C Textbook - Tipler 6th edition companion website for student, good review material.

Web Assign - Physics homework submission website.

FlockDraw - Online wipe boards for multiple users.

Hippo Campus - site with video tutorials for Physics Concepts

Virtual Air Track - site for momentum transfer and collisons.

Star Date - site for up to date news in astronomy. Click on Radio and choose Listen.

Sky View Cafe - Virtual Planetarium, you can choose to see the stars from any location on Earth. Click on Interactive Planetarium.

Animoto - Presentations to music.