PhET Logo
The PhET Blog
Physics Education Technology - University of Colorado, Boulder

See PhET at NCTM 2015 April 15-18 in Boston


See us at our Booth #647 at the exhibit hall. And, on Friday, learn about how to use PhET Sims in your math classes with Karina Hansberry and Amanda McGarry.

Practical Strategies for Teaching with Interactive Computer Simulations
Friday, April 17, 2015: 11:00 AM-12:00 PM
153 C (BCEC)
You can use interactive simulations (sims) to engage your students with math content and support their development of the CCSS mathematical practices. Learn practical strategies for integrating sims into your teaching and designing sim-based activities. Videos of teacher practices for effective sim use and lesson plans will be shared.


Apr 9


New HTML5 Simulations: Molecule Shapes and Molecule Shapes: Basics

Molecule Shapes

Now both Molecule Shapes and Molecule Shapes: Basics are available in HTML5. Explore molecule shapes by building molecules now with your fingers! Learn how molecule shapes change and what affects them.


Apr 6


New #HTML5 Least-Squares Regression Simulation

Least-Squares Regression

In the new #HTML5 Least-Squares Regression simulation, students can flexibly explore ideas related to correlation, best-fit lines, residuals, and outliers. Build a data set or use real-world data to discover the meaning of a correlation coefficient and determine when a linear fit is reasonable.

Least-Squares Regression is appropriate for any grade level that is studying scatter plots, best-fit lines, regression, or correlation, and is specifically aligned with Common Core State Standards in high-school mathematics.


Mar 31


Learn How to Guide Exploration with PhET Sims

Facilitating Acivities

Now at our For Teachers site, we’ve added tips on how to productively guide a student’s exploration with PhET Sims. See the latest video Facilitating Activities with PhET: An Overview, and download support materials including:

Effective Facilitation of Activities in Elementary and Middle School. A detailed overview of facilitation strategies to help students work effectively on activities using PhET simulations.

PhET’s Reflection Rubric. A rubric for teachers to reflect on the success of an activity using PhET simulations in K12.


Mar 24


PhET Downtime: Friday, March 20, 2015 10 PM to Saturday, March 21 8 AM

PhET ( will be unavailable from Friday, March 20 at 10:00 PM Mountain Daylight Time until Saturday, March 21 at 8:00 AM Mountain Daylight Time due to necessary maintenance performed by the University of Colorado Office of Information Technology.

We apologize in advance for the inconvenience and thank you for your patience.


Mar 17


Come See PhET at NSTA 2015 in Chicago


Will you be attending the National Science Teachers Association National Conference in Chicago, March 12-15, 2015? Join PhET at the following events

Stop by our booth #554 and play with the latest HTML5 PhET sims, learn about our Teacher’s Tips, or just say “hi.”


Mar 10


2015 OER Week March 9-13, 2015

Open Education Week

PhET is one of many providers of “Open Educational Resources” (OER) and is a big supporter of the larger open education movement. This week brings many opportunities to learn more about OER projects and the opportunity for OER to impact teaching and learning worldwide. See their list of events here And, use the hashtag: #openeducationwk on Facebook and Twitter to spread the word of OER!



Mar 5


How Red, Green and Blue Make A Rainbow…or a Dress

Color Vision #TheDressWith the Internet all abuzz over the color of #TheDress, the time is perfect to introduce students to how red, green and blue make up the colors of our world. Learn about how red, green and blue make a rainbow in the Color Vision sim.


Feb 27


Free Encore Webinar on Using PhET for Teaching Chemistry with Trish and the AACT


Did you miss Conifer Chemistry Teacher and PhET K12 Specialist Trish Loeblein discuss her personal experiences on how and why she uses PhET in her chemistry classroom last fall?

This Wednesday, Trish will give an encore presentation, including addressing suggestions and questions from the over 190 attendees from last fall’s webinar. Listen to and chat with Trish as she shares her strategies, course planning documents, lessons, and student handouts for regular and advanced chemistry.

Date: Wednesday, February 25, 2015
Time: 5 PM, MST
Register at


Feb 19


Working with Fractions?

Fraction Matcher

Try the #HTML5 tablet/browser-compatible Fraction Matcher simulation. A great way to improve fraction skills for the younger student. Match shapes and numbers to earn stars in this fractions game. Students can challenge themselves at different levels, collecting stars as they improve their fraction skills. Choose between the “Fractions” and “Mixed Numbers” tabs for more learning fun.


Feb 17