Kathy Perkins is Director of PhET Interactive Simulations (2008-present) and Professor Attendant Rank in Physics, specializing in Physics Education and STEM Education Research. She previously served ...

Traditional instruction in geometric optics is not as effective as using interactive simulations. PhET Interactive Simulations created a geometric optics Flash simulation in 2004, but modern browsers ...

There are two main goals for the PhET sims: increased student interest and improved learning. The animated, interactive and game-like environments help students learn through exploration.