Summary:
Zip code 06340 is home to a single middle school, Groton Middle School, which serves grades 6 through 8 with 884 students and is part of the Groton School District. Because only one middle school exists in this area, this analysis focuses on how the school performs relative to its district and the state of Connecticut.
Groton Middle School is a school showing meaningful improvement. In 2025–2026, the school improved its state ranking from the 43rd percentile to the 50th percentile, earning 3 stars after two years at 2 stars. Proficiency increased in every subject and grade level compared to the prior year, with the largest gains in 8th grade ELA (+9.7 points) and 8th grade science (+6.8 points). The 7th grade is the school's brightest spot: 53.4% of 7th graders were proficient in ELA, exceeding the state average of 52.2%, and 7th grade math was essentially tied with the state at 44.0% versus 44.1%. The school also reports a chronic absenteeism rate of 14.3%, which is lower than both the district's 16.5% and the state's 16.4%, and a favorable student-teacher ratio of 11.7 to 1.
The main area of concern is 8th grade mathematics, where only 31.7% of students were proficient in 2025–2026 compared to 41.9% statewide, a gap of more than 10 percentage points. Overall, the school outperforms its district in nearly every subject but trails the state in most areas. With 80.77% of students eligible for free or reduced lunch, the school serves a high-need population, yet it sits at the median of Connecticut middle schools—a noteworthy achievement given the strong link between poverty and test scores. For parents, Groton Middle School appears to be a school moving in the right direction, with broad gains across subjects and a particularly strong 7th grade program, though targeted support in 8th grade math may be needed as students prepare for high school.
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