[Assess students' ability to create a sustainable schoolyard mini‑ecosystem that reduces stormwater runoff, uses native plants to support pollinators, and conserves water. Students will submit a labeled top‑view plan showing drainage features (e.g., rain garden, bioswale, permeable paving), native plant placement for pollinators, and water‑saving elements (mulch, rain barrels, drip irrigation). Include a materials list with quantities, simple runoff reduction or water‑savings estimates, and a brief written justification linking design choices to ecological functions and native species needs. Suitable for Grades 3–5 with advanced planning and measurement tasks.]