Summary:
ZIP code 06351 contains just one middle school, Griswold Middle School, which serves grades 5–8 in the town of Griswold, Connecticut, and is part of the Griswold School District. With 529 students and a 14:1 student-teacher ratio, the school has ranked near the middle of Connecticut middle schools in recent years: it reached the 51st percentile (3 stars) in 2023–2024, then slipped to the 42nd percentile in 2024–2025 and 44th percentile in 2025–2026, earning a 2-star rating in each of the last two years.
The clearest academic strength at Griswold Middle School is English language arts, especially in the upper grades. In 2024–2025, 8th grade ELA proficiency hit 66% — 15.3 points above the state average — and 7th grade ELA in 2025–2026 was 56.6%, also beating the state. Grades 5 and 6 ELA were closer to or slightly below state averages, but the overall pattern suggests strong literacy work in later middle school. The school also keeps attendance relatively strong: its chronic absenteeism rate is 13.7%, better than the district's 19.1% and the state's 16.4%. This is a positive sign for student engagement, especially given that more than half of students qualify for free or reduced lunch.
Mathematics is the main area of concern. Proficiency rates in math consistently trail the state, with 7th grade math especially low at 30.9% in 2025–2026 compared with 44.1% statewide. Only 8th grade math (43.7% in 2024–2025) managed to top the state average, by 2.9 points. Since the school's test results are nearly identical to the district's results across every grade and subject, Griswold Middle School essentially drives the entire district's middle school performance. The bottom line: families will find a mid-ranking school with standout ELA outcomes in grades 7 and 8, better-than-average attendance, and a clear need for stronger math instruction — bright spots worth building on despite the modest overall star rating.
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