Summary:
Zip code 01257 covers Sheffield, MA, and its three public schools operate within the Southern Berkshire district: two elementary schools and one high school, together enrolling 596 students at the same listed street address. Mt Everett Regional serves grades 6–12 with 278 students, while Undermountain (grades PK–5, 260 students) and New Marlborough Central (grades PK–3, 58 students) cover the elementary years.
Results differ meaningfully across the three. New Marlborough Central posted the strongest 2024–2025 all-grade proficiency in the group — ELA 56.25 and math 43.75, both above district and state — but with only 58 students percentages can swing sharply, and it has no 2025–2026 test scores or recent rank history in these records. Mt Everett Regional shows the clearest subject strength in Biology (56.25 end-of-course in 2025–2026 vs. state 37.68) and a 92.3% graduation rate, though 10th grade ELA (30.00) and math (32.14) fell below state, as did its all-grade ELA and science. Undermountain stood out in science (48.89 all grades, including 48.89 in 5th grade) and ELA (41.54 all grades; 3rd grade 60.00), while its math trailed the district slightly; its rank moved from 2 stars in 2024–2025 to 3 stars in 2025–2026.
Spending and staffing vary as well. Mt Everett Regional spends the most ($27,481 per student in 2020–2021) and has the lowest student-teacher ratio (7.8), Undermountain spends $26,686 with a ratio of 9.1, and New Marlborough Central spends the least at $22,675 with a ratio of 8.4 — yet the lowest-spending school showed the highest 2024–2025 proficiency. Free/reduced-lunch data are not reported for any of the three, spending figures are several years old, and some grade-level results rest on small cohorts, so these numbers are best read as a snapshot rather than a definitive picture.
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