Etoys is a free open-source programming environment that runs on many platforms and can be used to create simulations. Etoys can be programmed by novices using graphical programming tiles. Everything in the etoys world is an object. Each object has properties and can send messages to other objects. The objects are like actors on a stage. Each object can be imbued with actions that can simulate real situations. The etoys environment has the advantage that authoring is an integral part of the environment and with extreme late binding the programmer receives instant feedback on any changes made. The two projects described below are written in etoys and are open for your exploration. You need to download and install etoys at Squeakland. If your browser doesn't allow you to open the project, check to see that blocking is off. If you still can't open the project directly in Etoys, you may have to save the project to your hard drive and open it in Etoys locally on your computer. If you can't find a computer where you can install Etoys, it is possible to run the simulation off a memory stick. You can download a copy of Etoys-To-Go at Squeakland.. You need to unzip the downloaded file and put Etoys-To-Go and the simulation (the simulation is an Etoys project with an extension .pr) on the same memory stick. The project file should go in the Etoys directory on the memory stick.
Chapter 11: Modeling and Simulation in the Physics Classroom
Chapter 13: NASA's Launch Abort System: Learning by Simulation
Designed by Randall Caton.      You can reach me at firstname.lastname@example.org.