Does anyone know of a good physics interactive computer program to mess around with, and perhaps even learn something? maybe even a mathematics program as well would be cool. if you have any ideas, i'd appreciate you sharing!
http://phet.colorado.edu/simulations/index.php?cat=Featured_Sims" [Broken] (Out of the University of Colorado Physics Education Research Group) is popular (I use it a lot with my classes)... but you probably really need some guidance to get the most out of them... look at the activities in conjunction with a text, or look at some of the activities teachers have posted.
I also like Phun (the 2-D physics emulator mentioned before)... but it has no guidance either for really getting to understand the concepts.
I am leaning heavily on vPython for developing coursework in physics. It is a sneaky way to get my students working on integrating mathematics with the physics concepts, and they accidentally learn some computer programming skills (rudimentary) on the way.