Summary:
The 02026 ZIP code is home to seven schools serving about 2,668 students in the Dedham district — five elementary schools (including the PK–K Early Childhood Center), one middle school and one high school. Dedham High is the largest with 719 students, followed by Dedham Middle School at 555, while the tested elementaries range from 206 to 321. District-wide the Dedham district ranks 148 of 351 in Massachusetts — the 58th percentile, 3 stars — but that average hides large differences among individual schools.
Greenlodge is the strongest and most consistent performer, holding 4 stars and the 81st–84th percentile for three straight years, with 2025–26 proficiency of 58.56% in ELA, 65.19% in math and 42.86% in science — the highest math result in this file. Oakdale also earned 4 stars and improved the most, rising from the 62nd to the 78th percentile and gaining 9.29 points in ELA and 14.04 points in math. Dedham High shines in 10th-grade math at 57.58% versus 43.73% statewide, with a 91.9% graduation rate, above the district's 88.8%. Dedham Middle School beats the state in math (50% vs. 41.11%), ELA (43.45% vs. 40.03%) and 8th-grade civics (44.25% vs. 39.77%).
Avery is the clear outlier: the only 1-star school, at the 28th percentile, with ELA 28.88%, math 29.41% and science 26.39% — all below state and sliding downward. Science is a shared weak spot: Dedham Middle School's 8th-grade science is 31.61% vs. 38.93% statewide, and Greenlodge's science fell from 60% to 42.86%. Riverdale improved from the 47th to the 58th percentile and leads the file in science at 45%, but swings sharply by grade. The Early Childhood Center has no test or rank data. Free/reduced-lunch figures are unavailable, spending data are from 2020–21, and small enrollments can cause large year-to-year changes.
Thank you for your feedback!