Summary:
Mount Greylock has just one high school in this data set: Mt Greylock Regional High, located in Williamstown and serving grades 7–12 with 539 students. It belongs to the Mount Greylock district. Since it is the only high school in the area, there is no school-to-school comparison to make here; the most useful benchmarks are the district, the state, and the school's own past performance. One important note for parents: because the school covers grades 7–12, its "high school" results blend middle school and high school scores together.
Academically, the school performs well above Massachusetts averages. In 2025–2026 MCAS results, it beat the state in every reported subject and grade. Standouts include 10th-grade math at 67.44 (+23.71 points over state), 8th-grade ELA at 62.5 (+20.8), 8th-grade science at 59.22 (+20.29), and 10th-grade ELA at 65.52 (+20.04). The biggest recent change is improvement in math and science: math rose from 42.79 to 57.35 (+14.56 points) and science from 46.36 to 59.22 (+12.86). In 2024–2025 the school trailed its district in both; by 2025–2026 it was ahead in both. ELA stayed a steady strength at 57.35, roughly +17 points above state, though slightly down (−0.75) from the prior year.
The school ranked 69th of 353 high schools in 2025–2026, at the 80th percentile with 4 stars — the same percentile it held in 2023–2024, after a modest dip in 2024–2025. Completion outcomes are strong: a 95.8% graduation rate and a 4.2% dropout rate in 2024–2025. Resources include a student-teacher ratio of 11.4 and per-student spending of $20,369 (2020–2021). Economic context is unknown, since free/reduced lunch data were not reported.
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