Founded in 2002 by Nobel Laureate Carl Wieman, the PhET Interactive Simulations project at the University of Colorado Boulder creates free interactive math and science simulations.

By converting our sims to HTML5, we make them seamlessly available across platforms and devices. Whether you have laptops, iPads, chromebooks, or BYOD, your favorite PhET sims are always right …

‪States of Matter‬

Build and explore AC circuits with interactive simulations featuring components like resistors, capacitors, and switches to understand electrical concepts.

Explore and experiment with interactive circuit simulations to learn about batteries, resistors, light bulbs, switches, and electrical concepts like Ohm's law.

Founded in 2002 by Nobel Laureate Carl Wieman, the PhET Interactive Simulations project at the University of Colorado Boulder creates free interactive math and science simulations.

This is an interactive sim. It changes as you play with it.

Explore interactive simulations to understand reactants, products, and leftovers in chemical reactions through engaging visualizations and hands-on learning experiences.

Design and explore your own solar system with interactive simulations, observing gravitational forces and celestial body orbits.

Explore gravitational force and its effects on objects in an interactive simulation by adjusting mass, distance, and size parameters.