Assess students' ability to apply basic rain garden design principles to reduce stormwater runoff and improve local water quality. Given a small property scenario, students will calculate a suitable garden footprint from roof/pavement area and a provided rainfall depth (use a simple runoff coefficient), choose three appropriate native or low-maintenance plants and justify their root, moisture, and pollutant-filtering roles, identify a safe and effective placement considering slope and utilities, describe soil/infiltration or overflow features, and outline routine maintenance and safety considerations. Include one brief calculation, a plant list, and short rationales for placement and maintenance.