Summary:
ZIP code 01366 contains exactly one school: Petersham Center, an elementary school serving grades K–6 with 142 students in Petersham, Massachusetts, part of the Petersham district. Because this ZIP has only one school, there is no cross-school comparison to make within the area — this single K–6 campus represents the community's entire listed elementary option. The ZIP shows 1 elementary school and 0 middle, 0 high, and 0 alternative schools, so the data does not describe where students continue after Grade 6.
Petersham Center is a standout by the available metrics. It scored above the state average in every tested subject in both 2024–2025 and 2025–2026. In 2025–2026, ELA proficiency was 56.58 versus a state figure of 40.03, mathematics was 51.32 versus 41.11, and science was 60.00 versus 40.98 — the largest all-grade gap being science, at 19.02 percentage points above the state. Its state rank climbed from 460 of 916 (50th percentile, 3 stars) in 2023–2024, to 323 of 906 (64th percentile, 3 stars) in 2024–2025, to 270 of 899 (70th percentile, 4 stars) in 2025–2026 — an improvement of 190 rank positions and 20 percentile points. The Petersham district is ranked 106 of 351 statewide, at the 70th percentile with 4 stars.
Upper elementary is the clearest strength: in 2025–2026, Grade 6 ELA was 77.78% proficient versus 40.26% statewide, and Grade 6 mathematics was 72.22% versus 42.59%; Grade 5 ELA was 65.00% versus 38.15%, and Grade 5 mathematics 55.00% versus 39.50%. The main relative soft spot is early-grade mathematics — Grade 3 was 40.91% versus 42.19% statewide, and Grade 4 was 37.50% versus 43.20%. Science slipped from 76.19% in 2024–2025 to 60.00% in 2025–2026 but remained well above the state. The student-teacher ratio is 11.3 for 2024–2025, and per-student spending was $18,199 (2020–2021). The free/reduced-lunch field is not provided for 2024–2025 and should not be read as 0%. Because the school is small, year-to-year swings should be interpreted with caution.
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