Summary:
ZIP code 53098 in Watertown, Wisconsin has four schools serving about 1,429 students: two elementaries (PK–5 and K–5) and two high schools (grades 9–12), all in the Watertown Unified School District. There is no middle school in this ZIP, so grades 6–8 are not visible here. All four schools carry the same district label — 2 stars, 33rd percentile (289 of 432) — but that single rating hides four very different schools.
Endeavor Charter School is the clear standout, earning 5 stars three years running (93rd percentile in 2025–26). Its graduation rate is 100%, its dropout rate 0.0%, and it beat the state in all four tested subjects — social studies 100% vs. 48.25%, ELA 81.82% vs. 48.47%, science 72.73% vs. 43.20%, math 45.45% vs. 42.93% — while spending $8,677 per student, less than half of what the other three spend. Watertown High School sits in the same building and graduates 98.3% of students with a 0.2% dropout rate, both better than the state, but scored below state in every subject in 2025–26; its math fell 10.2 points after being above state the year before. With only about 11 students tested at Endeavor, each one moves results roughly 9 points, and its 19.6% chronic absenteeism is the highest in the ZIP.
Among the elementaries, Douglas Elementary serves the highest-poverty population (56.91% FRPL) with the smallest classes (10.7:1) and still beat the state in 5th grade ELA (58.54%) and math (60.98%). LEAP Elementary has swung the most — from the 90th percentile in 2023–24 down to the 29th percentile in 2025–26 — while posting the ZIP's lowest chronic absenteeism (8.2%), highest spending ($19,159), and largest classes (18.7:1). Because these schools have only about 9–12 students per tested grade, one student can shift a rate by 8–11 points, so treat sharp year-to-year swings as directional signals rather than precise measures.
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