Summary:
Derby’s 13 schools include nine elementary schools, two middle schools, a high school and an alternative school, covering students from elementary through high school. In 2025–26, the schools’ average proficiency was about 47% in English language arts (ELA), 40% in math and 39% in science, compared with state figures of 46%, 41% and 38%. The averages hide the most important finding for families: results vary widely from school to school, with gaps of about 42 percentage points in ELA, 40 in math and 50 in science.
Park Hill Elementary leads the supplied all-grades results in ELA at 71% and math at 57%; its 2025–26 SchoolDigger ranking is at the 86th percentile, the highest in the list. Stone Creek Elementary leads science at 59%. At the other end, Paul B. Cooper Elementary has the lowest ELA result at 29%, Oaklawn Elementary the lowest math result at 17%, and Derby Virtual School the lowest science result at 9%. Wineteer Elementary is a notable strong performer across all three subjects—63% in ELA, 49% in math and 51% in science—with a free/reduced-lunch rate of 64%.
Recent changes are mixed: average ELA was nearly unchanged across the two score years, math rose by about 2 percentage points, and science fell by about 3 points among the 11 schools with results in both years. Wineteer improved in all three subjects, while Derby North Middle School declined in all three; its SchoolDigger ranking also fell from the 64th to the 37th percentile. Context measures do not follow a simple pattern: Tanglewood Elementary has a 25.1 student-teacher ratio and scores of 60% in ELA and 57% in math, while Oaklawn has a ratio of 8.9 and the lowest math result. Because schools serve different grade spans, grade-level results are more useful for direct comparisons when available.
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