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Physics Education Technology - University of Colorado, Boulder

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Donate Today to PhET’s Annual Giving Campaign and Help Bring More Sims to HTML5


Dear PhET Friends, Users and Supporters,

A big ‘Thank You!’ to all of you who have already supported PhET during our registration process!

If you considered donating, but haven’t gotten to it yet, there’s still time! Remember, we rely on donations from people like you. Your donation will go to building more HTML5 sims. Every dollar really does help! So please pitch in and keep PhET free for millions of learners around the world.

Suggested donation amounts are:

  • $15 (if you use 1-4 sims)
  • $25 (if you use 5-14 sims)
  • $50+ (if you use 15 or more sims)

Make your gift today:

Or, if you’d like to donate specifically to bring Circuit Construction Kit to HTML5, donate here:

Thank you and Happy New Year!

Your PhET Team,
Dr. Kathy Perkins, Director and Dr. Kathy Dessau, Assistant Director
along with Aadish, Amanda, Amy H., Amy R., Argenta, Ariel, Arnab, Ben, Beth, Bryan, Bryce, Carl, Chris, David U., David W., Emily M., Emily R., Jesse, John, Jonathan, Liam, Linda, Mariah, Matt, Michael, Mike, Oliver O., Oliver N., Robert, Sam R., Steele, Stephanie, and Trish


Dec 15


Feeling Off Balance?

Balancing Act

Feeling off balance this holiday season? Try putting some balance back into life with the Balancing Act sim and teach about force, torque and rotation.


Dec 8


Support STEM Ed on #GivingTuesday


It’s #GivingTuesday, a global day dedicated to giving back!

Give the gift of science and math to millions of children around the world by supporting your favorite OER STEM resource.

If you’d like to donate to PhET, support us at


Curious about #GivingTuesday? Learn more at:



Dec 1


Scheduled Maintenance: Tuesday, November 24, 2015 at 5:30 PM Mountain Standard Time

We will be upgrading the PhET servers on Tuesday, November 24 at 5:30 PM Mountain Standard Time. We expect that the maintenance will last only 60 minutes. During this time, PhET ( may experience periods of unavailability. If you experience persistent issues, please e-mail the PhET Help Desk at

Thanks for your patience during our system maintenance.


Nov 24


Wonder What Kind of Research PhET Does?

PhET Research Page

Visit our Research page to see what kind of research we do around PhET simulations.



Nov 18


PhET Director at NSF’s #NSFNextGenSTEM Forum


Excited that PhET Director Kathy Perkins will be speaking today at the 2015 Next Generation STEM Learning for All Forum

Assistive Technologies for Learning: Broadening Participation in STEM
Room: Salon 2
Jenna GorlewiczEthan DanahyKathy PerkinsDonna Lange, and Richard Ladner
Technology has propelled personalized learning for students and has expanded our ability to understand and address disability-based differences in STEM education and workforce participation. Learn about innovative technologies, resources, and research discoveries that can contribute to a learner-centered climate for students with disabilities. How can these approaches become broadly integrated into next generation STEM schools?


Nov 9


Hooke’s Law is Already in Five Languages…and Growing!

Hooke's Law Translations

Our volunteer translators have been busy and Hooke’s Law (just recently published) is already available in five languages. More to come…and more HTML5 simulations coming soon, too!


Nov 5


Dept. of Ed Launches #GoOpen Campaign to Support OER!

PhET as an Open Education Resource is excited about the US Department of Education’s new #GoOpen Campaign that encourages states, districts, schools, and teachers to use openly licensed educational resources.

For more info, see:


Oct 30


New HTML5 Translation of Molarity Sim

MolarityPeruvian Spanis

We are excited to bring the first (of many) translated #HTML5 simulations. Molarity in Peruvian Spanish is now available at We along with many volunteer translators worked hard over the summer to get the translation utility ready. Look for many more #HTML5 translated sims to come!


Oct 28


New #HTML5 Hooke’s Law Sim!

Hooke's Law

In the new ‪#‎HTML5‬ Hooke’s Law simulation, students can flexibly explore relationships between applied force, spring force, spring constant, and displacement as they stretch and compress springs. They can simultaneously compare two different springs, or compare systems of springs connected in series and parallel. On the Energy screen, students can investigate force and energy plots and discover the effect of the spring constant and displacement on the potential energy stored in the spring.


Oct 21