Resources
Free books, simulations, tools and reference sheets, chosen and shared by teachers and learners. Pick a subject and a level to see what is there.
SimulationsExternal link
Test the pH of everyday liquids, and see how dilution changes the number and the ions in the water. Pairs with the lessons on acids, bases and pH. Simulation by PhET Interactive Simulations, University of Colorado Boulder, licensed under CC BY 4.0 (https://phet.colorado.edu).
SimulationsExternal link
Add protons, neutrons and electrons, and watch the element, the charge and the mass change. A good partner to the lessons on atoms and isotopes. Simulation by PhET Interactive Simulations, University of Colorado Boulder, licensed under CC BY 4.0 (https://phet.colorado.edu).