Create a Graph - Don't have Excel, or don't know how to use it?  Use this site.  (You will probably want to choose x-y graph, and then choose either the line or scatter option.

Bad Movie Physics - http://intuitor.com/moviephysics/

Graph paper:  incompetech.com/graphpaper/

Vector Addition:
Visualizing adding vectors
River and Boat applet
Another River and boat applet

Fan and Ball game:  accurate physics in a simple video game

Bloxorz: This will suck your time away.

Howstuffworks.com  - Always a favorite

sodaconstructor - wacky site where you can design shapes that bounce and squirm

sciencefriday.com - Radio show every Friday on NPR, talking about current topics in science.  Tons of cool interviews on every branch of science.  Search around!

Physics 2000 - U of Colorado - High tech "How things Work".  From a modern physics perspective

Physics of Sports - collection of sites revolving around (duh) the physics of sports!

• Exploratorium - science behind hockey, baseball, skateboarding, surfing, etc. Excellent detail within each site, including video and activities.
• Tennis Sports Science - includes experiments, wind tunnel videos, and even lesson plans!
• Sports activities - include bridges to other disiplines.
• More tennis - from the BBC. In depth, including history.
• Soccer from the BBC
• Baseball
• General video demos online
• A collection of sports physics links, toward the middle of the page.
• Aeronoautics of sports
• Mathletics!
• Alan Alda and his Science Frontiers show explore the science behind sport
• Great site for numerical facts

Scorched Earth:  The Mother of All Games:  you can customize the physics and destroy the other guy's tank!