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Principal Sponsors

The William and Flora Hewlett Foundation
The Hewlett Logo

Makes grants to address the most serious social and environmental problems facing society, where risk capital, responsibly invested, may make a difference over time.
The NSF LogoNational Science Foundation

An independent federal agency created by Congress in 1950 to promote the progress of science.

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FAQ

This page contains commonly asked questions and answers. If you can't answer your question here, please notify us by email at the following address: phethelp@phet.colorado.edu.

Where can I get the source code for the PhET simulations?

The source code for all PhET simulations is hosted at SourceForge. The latest version can always be found there. To access the source code, you will need a Subversion client such as TortoiseSVN (Windows-only) or SmartSVN (all platforms).

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