The PhET Interactive Simulations project at the University of Colorado Boulder creates free interactive math and science simulations. PhET sims are based on extensive education research and engage students through an intuitive, game-like environment where students learn through exploration and discovery.
PhET is committed to making the simulations accessible to all learners. Their accessible simulations include: verbal descriptions and feedback, the use of sound and music to represent foundational science and mathematics relationships, and alternative navigation that moves beyond mouse or touch inputs. They are creating research-based, accessible STEM education resources to ensure that all students can experience the benefits of PhET Interactive Simulations.
The site includes teaching resources, with tips and strategies for including simulations in the classroom. They encourage teachers to share activities on the site.