Summary
Henry P Clough is a PK–4 elementary school serving 398 students in Mendon, Massachusetts, one of two elementary schools in the Mendon-Upton district alongside Memorial School in Upton. In 2025-2026 it ranked 432nd of 899 ranked Massachusetts elementary schools (52nd percentile, 3 stars) — a stable, roughly average standing, but one that sits well below its own district, which ranks 101st of 351 districts (71st percentile, 4 stars). The school reached the 78th percentile with 4 stars in 2015-16 and has hovered between the 52nd and 66th percentile ever since, drifting to the bottom of that range over the past two years.
The defining feature is a split between subjects. Math is a genuine strength: 50.35% proficiency in 2025-2026 against a state figure of 41.11%, and above the state by 9 to 20 points in every year on record. English language arts is the weak spot, at 35.92% — about 4 points below the state and the first time in the available window that the school has fallen under the state average. Most of that comes from grade 4 reading, where 26.51% proficiency compares with 49.15% in grade 3; grade 4 math, by contrast, is the school's strongest number relative to the state (52.38% vs. 43.20%).
Comparisons close to home are the most informative. Memorial School in Upton — same district, about five miles away — ranks in the 86th percentile and posts 59.50% in ELA and 60.64% in grade-4 ELA, a 34-point gap over Clough in that grade, even though Clough spends slightly more per student ($17,375 vs. $16,874) and runs a similar student-teacher ratio. Memorial in Hopedale, under two miles away, also outperforms Clough in ELA (46.47%). Meanwhile the school's student-teacher ratio has risen from 13.0 to 14.2 in two years, among the highest in the local group, and free/reduced-lunch data is not reported, which limits how much context families can apply to subgroup results.
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