Middle School Biology Simulations from UC-Boulder

Middle School Biology Simulations from PhET, a project at the University of Colorado Boulder, provides fun, free, interactive, research-based science and mathematics simulations. They extensively test and evaluate each simulation to ensure educational effectiveness. These tests include student interviews and observation of simulation use in classrooms.

The simulations are written in Java, Flash or HTML5, and can be run online or downloaded to your computer. All simulations are open source (see our source code). Multiple sponsors support the PhET project, enabling these resources to be free to all students and teachers.