Free science and maths simulations from the University of Colorado Boulder. Students change variables and watch what happens: circuits, forces, waves, states of matter, probability and more.
Interactive Amplify
Pairs play the first level of PhET's Fraction Matcher, saying why two cards match before they press Check, and use the smiley face or the number line to decide their next move.
Students build each of the first ten elements particle by particle in PhET's Build an Atom, using its live readouts to correct their builds, then draw each shell diagram in their books.
Students build three specified circuits in PhET, enter their current and potential difference readings in a shared Google Sheet, and use the pooled table to state the series and parallel rules.
Interactive Transform
Pairs heat and cool water molecules in PhET's States of Matter: Basics simulation, testing three predictions about what particles do as a solid melts, a liquid boils and a gas is cooled again.
This page is one of a growing set of PICRAT examples by cell, subject and grade. Page maintained by Andy Perryer.