Bring AP Precalculus Unit 1 to life with The Clepsydra Challenge, a hands-on modeling project where students investigate how the shape of a vessel affects the rise of water.In this real-world investigation, students collect volume-height data, create a graph, analyze changing rates of change, compare wide and narrow sections of a vessel, and connect their results to concavity, domain, range, and mathematical modeling. This project is designed to support conceptual understanding of Unit 1 topics