🎤 Rotation Station Expo

Teams present their circular prototype, labeled scale drawing, and QR-linked project log to classmates, invited teachers or families, and the civil engineering guest if available. Each team gives a concise explanation of the problem, measurable criteria, chosen concept, test data, one revision, and how arc length, sector area, radians, scale factor, and volume informed the final design. Audience members leave at least 2 sticky-note questions or compliments at each station, and presenters answer questions using measurements, sketches, and calculations from their evidence board.