This teaching unit is designed to help students in grades 4-8 explore the concepts of scaling and proportion in the context of spacecraft design. The units in this series have been developed to enhance and enrich mathematics, science, and technology education and to accommodate different teaching and learning styles. Each unit consists of a storyline presenting the context for the problems to be solved, lists of the mathematics and science concepts addressed, background notes for the teacher, a list of teacher resources, and an activity complete with blackline masters. Also included are suggestions for extensions to the problems and their relationship to national mathematics standards. The story line for this unit is students examining how patterns, measurement, ratios, and proportions are used in research, development, and production of airplanes. (MM)