π This activity is part of the Winter Olympics STEM Bundle. Grab the full unit and save $4.25Bobsled Drag Design Challenge (Grades 6β8) Your students are about to do real engineering, the kind that makes them forget to ask, βIs this graded?β In this Winter Olympics inspired STEM challenge, teams design a cardstock bobsled shell to reduce aerodynamic drag, then run a simple pull test to collect data, graph results, calculate percent change, and defend the best design using CER (Claim, Evide