PhET provides fun, free, interactive, research-based science and mathematics simulations. We 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.
What is PhET? A short introduction to the PhET simulations
Videos About PhET
PhET has been the recipient of numerous awards:
More About PhET's Design
To help students engage in science and mathematics through inquiry, PhET simulations are developed using the following design principles:
Several tools in the simulations provide an interactive experience:
As users interact with these tools, they get immediate feedback about the effect of the changes they made. This allows them to investigate cause-and-effect relationships and answer scientific questions through exploration of the simulation. For more information, visit our research page.