5 complete engineering design challenges built around real-world scenarios — no prep required. Each challenge includes a teacher guide, student planning pages, reflection sheets, and scoring rubrics. NGSS aligned (ETS1-1 through ETS1-4). Adaptable for grades 4–10. Topics: wind energy, bridge engineering, thermal insulation, earthquake-resistant structures, and water sustainability. ✅ Print & Go — PDF-ready ✅ 100-point rubrics for each challenge ✅ Engineering Design Process framework built in ✅ V