Summary:
ZIP code 01827 covers Dunstable, Massachusetts, and contains just one public school: Swallow/Union School, an elementary school serving grades K–4 with 210 students in the Groton-Dunstable district. There are no middle, high, or alternative schools in this ZIP, so there is no other local school to compare it against; parents should look at this one school's own profile, which is unusually strong.
Swallow/Union ranked 9th out of 899 Massachusetts elementary schools in 2025–2026, placing it in the 99th percentile with 5 stars — the top 1% statewide. Its district is also highly rated: Groton-Dunstable ranks 34th of 351 districts, in the 90th percentile with 5 stars. Rank history shows 26th in 2023–2024, a slip to 109th of 906 in 2024–2025 (still 88th percentile, 4 stars), then a rebound to 9th. Even in its comparatively weaker year the school stayed in roughly the top 12% of the state, so that dip reflects relative position among high performers rather than low achievement.
Proficiency results in 2025–2026 were well above both district and state. In Mathematics, 82.8% of students were proficient, versus 59.29% in the district and 41.11% statewide — roughly twice the state average. ELA reached 73.4%, up 10.58 points from 62.82% the prior year, while district ELA fell 5.41 points and state ELA fell 1.50 points. Math was consistent across grades (82.61% in 3rd grade, 82.98% in 4th), and 4th grade ELA, at 70.21%, was the lowest reported school figure but still 32.78 points above the state. The student-teacher ratio is 13:1 (2024–2025) and per-student spending was $19,744 (2020–2021). Free/reduced-lunch data is not reported, so socioeconomic context is unknown rather than zero.
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