Plate Tectonics is an interactive simulation in which users design scenarios involving plate interactions and observe the results over time. The simulation consists of two screens. In the first, entitled Crust, students can investigate the physical characteristics of temperature and density for either oceanic or continental crusts. In the second screen, entitled Plate Motion, students will select the crusts and plate boundaries for each run. Students can then select either manual or automatic mode. In order to access any of the teacher resources, educators must create a free account. Working with the simulation would take one classroom period of 45 - 60 minutes; the construction of an explanation for the observed phenomenon would take an additional class period. Plate Tectonics runs on a Windows platform and requires the latest version of Java.