Thursday morning we took a before-lunch-break to try out MathWorlds, the new SimCalc software introducing students to concepts of change/calculus. We played with different activities that came with the program, but it is also possible to create your own simulations relatively easily. The ones that come with the program are quite graphically interesting and fun as well as useful.
We spoke with one of the makers over telephone and had the opportunity to find out some inside information on the product. The software is free, and it is only available for MacIntosh until a publisher becomes involved. They plan to continue to write more simulations but they're also looking to work with the Math Forum and others to set up programs supporting anyone wishing to author new activities. Please write to us and/or to the SimCalc folks with any questions, comments, or authoring interest. <mailto:"email@example.com">Jeremy Roschelle
They've done a good job of thinking about how students can represent concepts of change and it is a great piece of software. You can download it from .