Summary:
Ayer Shirley Regional High School is the only high school in the Ayer Shirley School District, serving grades 9–12 with 417 students at 141 Washington Street in Ayer, MA.
Because there is just one high school in this district, comparisons are best made between the school, the district, and the state. Ayer Shirley Regional High School stands out most in science and biology: in 2025–2026, science proficiency was 55% versus 40.5% statewide, and Biology End of Course proficiency was 65.63% versus 37.68% statewide — the strongest result in the record and nearly 28 points above the state. English Language Arts has been consistently strong and stable at about 58% proficient in both 2024–2025 and 2025–2026, and because state ELA results fell, the school's relative advantage grew. Mathematics was the weakest relative area in 2024–2025 at 39.56%, below the state's 44.6%, but rebounded to 45.12% in 2025–2026, slightly above the state's 43.73%. The school's ranking also recovered: after 136 of 349 at the 61st percentile with 3 stars in 2024–2025, it rose to 84 of 353 at the 76th percentile with 4 stars in 2025–2026 — above the district's overall 55th percentile and 3-star rating. The 95.9% graduation rate exceeds the district's 94.3%, while the 3.3% dropout rate matches the district.
Two data limitations matter. The free/reduced lunch percentage is not provided, so that context is unknown and should not be read as 0%. The $19,721 per-student spending figure is from 2020–2021, several years older than the test and rank data. With 417 students across grades 9–12, each grade is roughly 100 students, so a few students can shift percentages noticeably — worth keeping in mind when comparing year to year.
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