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

Archive for the ‘New Sims ’ Category

New HTML5 Tablet-Compatible Fraction Matcher Simulation!

Fraction Matcher

Try our new 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.


Jul 22


Make Your Own Summer Drinks with PhET’s Concentration Sim


Mix “virtual” summer drinks with the Concentration simulation. Watch your solution change color as you mix chemicals with water. Then check molarity with the concentration meter. What are all the ways you can change the concentration of your solution? Switch solutes to compare different chemicals and find out how concentrated you can go before you hit saturation!

Then have more fun by making your own lemonade or summer drink!


Jun 6


Fuel PhET’s Summer Work with Our End-of-School Campaign


Over the 2013-14 school year, we were able to redesign and publish 16 new HTML5 versions of our simulations. And, even though school’s ending, PhET will be hard at work during the summer.

So please donate today and keep this important work on track. Together, we can make the draft version of Circuit Construction Kit a reality, and bring the many other simulations to HTML5 compatibility along with a more modern look and feel.


Jun 2


PhET Offered at the New Microsoft Office Mix App Store

Screen Shot 2014-05-12 at 1.59.30 PM

We’re excited to partner with Microsoft and offer a PhET app for the new #OfficeMix, the easiest way to make online lessons with videos, quizzes, and other interactive elements, now including PhET simulations! See this new exciting software at Watch a Mix of PhET sims here.


May 14


New HTML5 Acid-Base Solutions Simulation Now Online!

Acid-Base Solutions

We’ve added Acid-Base Solutions to our collection of HTML5 simulations. Thank you Royal Society of Chemistry for your generous donation that supported the development of this simulation. See these simulations at PhET’s site and at LearnChemistry.

How do strong and weak acids differ? Use lab tools on your computer to find out! Dip the paper or the probe into solution to measure the pH, or put in the electrodes to measure the conductivity. Then see how concentration and strength affect pH. Can a weak acid solution have the same pH as a strong acid solution?



Apr 23


Newest HTML5 Simulation: Under Pressure

Under Pressure

Our popular Under Pressure simulation is the latest addition to our growing collection of HTML5 simulations. Explore pressure under and above water. See how pressure changes as you change fluids, gravity, container shapes, and volume.

Want to see more HTML5 simulations? Support bringing Circuit Construction Kit to iPads and tablets:


Apr 14


Another New HTML5 Simulation: Friction

HTML5 Friction


We’ve added yet another HTML5 simulation: Friction.

Learn how friction causes a material to heat up and melt. Rub two objects together and they heat up. When one reaches the melting temperature, particles break free as the material melts away.

Want more HTML5 simulations? Help bring Circuit Construction Kit to iPad.



Jan 15


New HTML5 ph Scale: Basics Simulation for Middle School Students

pH Scale: Basics

Try the newest HTML5 simulation addition: ph Scale: Basic. Based on the JAVA pH Scale, the new HTML pH Scale: Basics  opens up the world of acids and bases to middle school students.

Test the pH of things like chicken soup, hand soap, blood, spit and soda. Investigate whether changing the volume or diluting with water affects the pH.

Want more HTML5 simulations? Help bring Circuit Construction Kit to iPad.



Jan 10


Thank you PI (Physik Instrumente) for your support!

optical tweezers

Thank you PI, a manufacturer of precision motion systems, for becoming a corporate sponsor of Optical Tweezers and Applications.  Your support will help PhET upgrade our servers to the latest technology and keep the simulations free for students around the world.

If you’d like to join PI and become a sponsor, please consider supporting PhET in your annual year-end donations. Every donation helps! Together we can improve the way science and math are learned. Choose:


Dec 17


HTML5 Forces and Motion: Basics

Forces and Motion Basic

Try the new HTML5 iPad-compatible Forces and Motion: Basics simulation. Explore the forces at work in a tug of war or pushing a refrigerator, crate, or person. Create an applied force and see how it makes objects move. Change friction and see how it affects the motion of objects.

Like our tablet-compatible simulations? Support bringing Circuit Construction Kit to iPads:

Or support building the “Teach with PhET” website:

Every donation helps! Together we can improve the way science and math are learned.


Dec 6