In this hands-on STEM challenge, students will design, build, test, and redesign a paper helicopter to maximize fall time using air resistance. Perfect for teaching gravity, forces, and the engineering design process (EDP), this resource also includes a full substitute plan — so you can run the lesson even if you’re not there. What’s IncludedComplete 45–60 minute lesson plan with timelineSubstitute Quick-Start guide – print & goStudent worksheets (Pre-Activity, Design, Data, Debrief, Extension