'PhET Interactive Simulations, a project at the University of Colorado Boulder, is a non-profit open educational resource project that creates and hosts explorable explanations. It was founded in 2002 by Nobel Laureate Carl Wieman. PhET began with Wieman's vision to improve the way science is taught and learned.' Wikipedia
PhET has created online simulations for the following range of subjects:
Physics
Chemistry
Mathematics
Earth Science
Biology
In the page below, we've included just one simulation for each of the above. After reviewing the simulations, we encourage you to explore the website link to investigate what other simulations are available and how these can add value to your lesson plans.