Summary:
Dedham has just one public high school in this data set: Dedham High, which serves grades 9–12 and enrolls 719 students. It belongs to the Dedham district, ranked 148th of 351 Massachusetts districts — the 58th percentile, with 3 stars. Because there is only one high school in town, there is no local peer school to compare against; the most useful comparisons are between Dedham High and its own district and the state averages.
Academically, mathematics is the school's clearest strength. In 2025–2026, 10th grade math proficiency was 57.58%, which is 13.85 percentage points above the state (43.73%) and 2.11 points above the district (55.47%). English language arts swung sharply: 10th grade ELA was 40.72% in 2024–2025, nearly 10 points below the state's 50.66%, then rose to 45.8% in 2025–2026, slightly above the state's 45.48%. Science slipped from 48.39% to 41.13%, a drop of 7.26 points, but still stayed above the district (39.53%) and state (40.5%). Across every reported MCAS comparison — ELA, math, science, and biology — Dedham High scored above its district, by roughly 1.2 to 2.3 points.
Outcomes are also relatively strong. The 2024–2025 graduation rate was 91.9%, 3.1 points above the district's 88.8%, and the dropout rate was 5.1%, 0.7 points lower than the district's 5.8%. School rank has been volatile — 68th percentile in 2023–2024, 55th in 2024–2025, and 62nd in 2025–2026 — though it held 3 stars each year. The student-teacher ratio was 10.3 in 2024–2025 and per-student spending was $22,292 in 2020–2021, but no benchmarks are available here. The free/reduced lunch figure for 2024–2025 is not reported, so that context is unknown.
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