This teaching unit is designed to help students in grades 4-8 explore the concept of measurement in the context of aeronautics. 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 exploring the concept of measurement and the tools used in measuring while learning what and how engineers and scientists use measurement during the process of developing, designing, and testing airplanes. (MM)