Modeling And Simulation Tools for Education Reform MASTER Tools, developed by The Shodor Education Foundation, Inc. are the result of on-going collaborations with the National Center for Supercomputing Applications (NCSA), George Mason University, and other education organizations. They are designed to be interactive tools and simulation environments that enable and encourage exploration and discovery through observation, conjecture, and modeling activities. Our growing portfolio of MASTER tools will soon be fully integrated with new collaboration tools and online research facilities to create an authentic scientific experience. All of our simulations and supporting curriculum materials are designed in accordance with the new National Science Education Standards and the National Math Education Standards. Instructional materials are currently available for GalaxSee, SimSurface, and the Fractal Microscope.