What better way to engage fifth-grade students in science and engineering practices than to use paper airplanes to encourage them to question, explore, create, and test designs! This multi-day unit draws from a fourth-grade curriculum (Pearson 2012) aligned with the "Next Generation Science Standards" (NGSS Lead States 2013) used in teacher education methods classes and taught to grade 5 students. In this article, we share an integrated unit that includes reading selections about Amelia Earhart and the forces involved in paper airplane flight, an overview of how we used paper airplanes in an experimental design process, and how we helped students develop conclusions based on the claims, evidence, and reasoning framework (CER; McNeill and Krajcik 2012).