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Physics Education Technology - University of Colorado, Boulder
PhET Blog

Archive for January, 2013

See PhET On EPISD Digital Discoveries

See Our Video on How to Use PhET Sims in Lectures

Using PhET in Lecture: Going Beyond Demos

Have you seen our latest video Using PhET in Lecture: Going Beyond Demos?

See how to use PhET simulations in powerful ways that engage a whole class in a large lecture setting. See examples of how you can incorporate clickers and other instructional techniques to deliver engaging interactive lecture demonstrations that will make maximum impact on student learning.


Jan 23


How to Run PhET Sims with the JAVA Security Advisory

On January 10th, 2012, the United States Computer Emergency Readiness Team (US-CERT) released a bulletin regarding security issues with Java. One of the recommendations in this bulletin is to disable Java in web browsers. In many cases, this will prevent running PhET simulations directly from the PhET web site.

If you are a user of PhET simulations, are currently running Java 7 and want to still be able to use PhET simulations, we recommend that you take the following steps:

  • Upgrade to the latest version of Java.
  • Disable Java from running in web browsers. Note that this will prevent the “Run Now” option from launching simulations from the PhET site. This article has information about how to perform this operation.
  • Run the simulations by downloading them via the “Download” button, and then running locally.

PhET will continue to monitor the situation surrounding Java security issues and will send out an update when the problems are fully resolved.

If you have questions or concerns regarding this, please contact us at

Thank you for using and supporting PhET Interactive Simulations!


Jan 15


Scheduled Downtime: Thursday, January 10, 2013 at 11:00 PM Mountain Standard Time

The University of Colorado Office of Information Technology will be performing a scheduled system reboot of the PhET server on Thursday, January 10 at 11:00 PM Mountain Standard Time. During this time, PhET ( will experience periods of unavailability. We expect that the outage will last only 10 minutes and that we will be back online very quickly. However, if you experience issues, please e-mail the PhET Help Desk at

Thanks for your patience during our system maintenance.


Jan 10


Thank you for your support!

Energy Skate Park HTML5 Prototype

Happy New Year!

And thank you to all those who pledged their support to PhET in 2012. We are looking forward to an exciting 2013 with new simulations as well as making our more popular sims tablet compatible.

Don’t forget to try the HTML5 prototypes at:


Jan 8