Discovery Education
Discovery Education: Physical Science
The Discovery Channel provides numerous lesson plans dealing with the physical sciences. Content is organized by grade level, but all lesson plans include suggestions for adaptations for older or younger audiences.
Other
Eal: Fract Ed
A great resource for beginners. The site begins with a definition of iteration of functions, and proceeds from there to discuss fractal dimension.
Cut the Knot
Cut the Knot!: Interactive Mathematics: Geometry Articles, Theorems, Problems
Contains over five hundred Geometry articles, problems, puzzles, and games. Some sites relating to circles are provided within this list.
Other
My Physics Lab: Chaotic Pendulum
Experiment with a damped driven pendulum to see what happens to the oscillation when you change the mass, gravity, or damping. Students can also change the starting position. Site includes equations to help students understand what is...