Summary:
Zip code 06455 contains exactly one school: John Lyman School, a small elementary school in Middlefield, CT, serving grades 2 through 4 with 207 students as part of Regional School District 13.
John Lyman School has several notable strengths. Only 4.0% of students were chronically absent in 2025-2026, compared to 8.7% for the district and 16.4% statewide, an excellent sign of student engagement. Fourth grade ELA proficiency is a standout at 64.6%, well above the state average of 50.9%. The school also benefits from a low student-teacher ratio of 10.7-to-1 and high per-student spending of $21,173, creating favorable conditions for learning. With only 18.36% of students eligible for free or reduced-price lunch, the school serves a comparatively low-poverty population.
However, there are areas of concern. While third grade ELA proficiency improved from 48.5% to 53.3% year over year, math performance lags behind: third grade math sits at 51.4% and fourth grade math at just 44.8%, both below state averages. The school's overall state ranking has also declined steadily, from the 76th percentile in 2020-2021 to the 66th percentile in 2022-2023 and now the 49th percentile in 2025-2026. The school's test scores exactly match district averages, meaning it is representative of Regional School District 13 as a whole. Since this is the only school in the zip code and it only serves grades 2-4, families must look outside the area for other grade levels.
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