Building and launching model rockets makes a great activity for a technology education class. A model rocket curriculum provides a valuable tool for improving students' technical skills, including following technical instructions and procedures while learning about aerospace technology. This article describes a way of making model rocketry more challenging and rewarding for students through the use of RockSim, a rocket design and simulation program that takes students through an engineering process in which they design their own rockets and perform flight simulations before constructing model rockets from their designs. (Contains 6 figures.)