Targeted for students in grades 4–9 and created by educators at NASA’s Jet Propulsion Laboratory, this lesson brings the excitement of model rocketry and engineering design to the classroom. Students work individually or in pairs to construct and launch paper rockets using a teacher-built PVC-pipe launcher, and calculate the flight achieved by the model. Then based on their rockets’ flight performance, students analyze and modify their designs, launch again, and recalculate the altitude achieved to determine if their changes affected the performance of the rocket. The lesson supports the Next Generation Science Standards while exploring rocketry, the engineering design process, and mathematics. Find the lesson plan, extension activities, and video tutorials at the website.