Summary:
ZIP code 55388 covers Watertown, Minnesota, where three public schools — all in the Watertown-Mayer Public School District — serve the entire K–12 pipeline: Watertown Mayer High (grades 9–12, 516 students), Watertown-Mayer Elementary School (K–4, 482 students) and Watertown-Mayer Middle (5–8, 418 students), totaling 1,416 students.
Reading is the district's strongest suit — every school beats the state's 48.6% proficiency mark, led by the middle school at 64.3% and the elementary school at 60.1%. Watertown-Mayer Middle is the academic standout: its fifth-grade math score of 69.5% nearly doubles the state's 41.9%, and it ranks in the 87th percentile of Minnesota middle schools after a 94th-percentile year. Watertown-Mayer Elementary School posts the ZIP's top math result at 66.5% versus 44.9% statewide, despite having the highest share of students from low-income families (30.29% free/reduced lunch).
Watertown Mayer High shows its strength in outcomes: a 90.4% graduation rate against 84.9% statewide and a 2.3% dropout rate versus 4.2% state — roughly 45% lower. Its all-grades math of 36.4% looks below state, but compared against the 11th-grade state figure it is slightly above, and its science score (38.8% vs. 25.5%) is well ahead. Two things for parents to watch: math and reading slipped in grades K–8 last year (middle-school math fell 7.2 points) while the state was essentially flat, and eighth-grade science sits at 11.5%, below the state's 16.7%, against 42.6% in fifth grade.
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