Summary:
Columbia, Connecticut is served by a single public school, Horace W. Porter School, a PK-8 elementary school enrolling 440 students within the Columbia School District. Because the district operates only this one school, school-level and district-level data are essentially identical. The school enjoys strong resources, including a 9.8:1 student-to-teacher ratio and $21,347 in per-student spending, while serving a moderate-poverty population with 22.05% of students eligible for free/reduced-price lunch.
Horace W. Porter's greatest strengths are in the early grades. In 3rd grade, 62.3% of students met ELA standards and 71.7% met math standards, well above state averages of 47.3% and 52.2%, respectively. The school also shines in 5th grade science (69% proficiency versus 52.9% statewide) and 7th grade math (60.4% versus 44.1% statewide). However, middle-grade math is uneven: 5th grade (41.9%) and 8th grade (40.7%) both fall below state averages, and the 10.3-point drop in 8th grade math from 51% to 40.7% year over year is the most concerning single metric. Fourth grade ELA also trails the state by 4.7 points.
The school improved its overall state ranking from the 48th percentile (2 stars) in 2024-25 to the 55th percentile (3 stars) in 2025-26, placing 219th out of 491 schools. Chronic absenteeism is a clear bright spot at just 7.5%, less than half the statewide rate of 16.4%. Since the district has no high school, students must transition elsewhere after 8th grade, making the recent math decline especially relevant to high-school readiness. Horace W. Porter provides a strong early-grade foundation and excellent science instruction, but improving math consistency across the upper grades will be essential to sustaining this positive trajectory.
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