Summary:
Millis, Massachusetts has just one middle school — Millis Middle — serving grades 6 through 8 with 267 students, so families here have a single option within the Millis district rather than a choice among schools. The school reports a student–teacher ratio of 12.1 to 1 (2024–2025) and per-student spending of $19,419 (2020–2021).
Millis Middle has ranked in the top quartile of Massachusetts middle schools for three straight years with 4 stars each time: 118th of 478 schools (75th percentile) in 2025–2026, 99th of 484 (80th percentile) in 2024–2025, and 130th of 493 (74th percentile) in 2023–2024. The Millis district overall ranks 127th of 351 (64th percentile, 3 stars), suggesting the middle school is a relative strength. On the 2025–2026 MCAS Next Generation tests, all-grade proficiency was 55.67% in English language arts, 49.47% in math, and 41.49% in science — at or above the district and the state in every subject.
Results vary by grade. Sixth grade ELA is the clearest weak spot at 36.54% proficient, below the state's 40.26% and roughly 30 points below the school's 7th grade (66.67%) and 8th grade (67.02%), both far above state. Math rises steadily by grade — 43.27%, 50.60%, and 55.32% in grades 6, 7, and 8 — all at or above state. Eighth grade civics stands out at 63.44%, about 23.7 points above state and up from 55.29% the prior year. Most all-grade scores dipped year over year — ELA from 57.63% to 55.67%, math from 51.53% to 49.47%, and science from 49.41% to 41.49% — though all stayed above state. Free/reduced lunch data is not reported, so socioeconomic context isn't available.
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