Summary:
Zip code 01581 covers Westborough, Massachusetts, and its two public middle-level schools: Mill Pond School (grades 4–6, 834 students) and Sarah W Gibbons Middle (grades 7–8, 610 students), both part of the Westborough district — 1,444 students combined. These are not competing schools but two consecutive stages of one pipeline: Mill Pond students move on to Gibbons.
Both schools score far above Massachusetts norms in every subject and grade tested. The smallest advantage anywhere in the data is Mill Pond's 4th grade English language arts, 16.20 points above the state; the largest is Mill Pond's 6th grade math at 78.29% proficient — 35.70 points above the state and the highest single grade-level score in this data set. Gibbons is the externally validated standout, ranked in the top ~30 of roughly 480–490 Massachusetts middle schools for three straight years, at the 94th–95th percentile with 5-star ratings each year. Its 8th grade civics result, 69.04%, also sits far above the state.
Comparing the two directly takes care: Gibbons serves older grades, and older grades score higher statewide, so its higher "all grades" ELA and math figures partly reflect grade mix. Each school is best judged against its own same-grade peers, and both are exceptional there. Mathematics is the strongest subject at both; science rose sharply at both (over 4 points each) while the state slipped slightly; ELA fell at both by roughly 2.4–3.0 points, mirroring a statewide decline. Per-pupil spending is nearly identical ($17,802 vs. $17,992), so spending does not explain performance — and those figures are from 2020‑21, five years older than the test scores. Free/reduced-lunch data is not reported for either school, and Mill Pond has no ranking history in this data.
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