In the Ranger Lookout Tower Build & Redesign unit, students become structural engineers as they design and build the tallest freestanding tower possible using constrained materials — then redesign it for greater height and stability. Set inside the Jungle Rangers narrative theme, this 2-week unit challenges Grade 2 students to investigate how base width, bracing, and material distribution affect a tower's height and stability, using data from their first build to make evidence-based improvement