Summary:
Regional School District 17 is a small, high-performing district in Connecticut serving the towns of Haddam and Killingworth, with three elementary schools covering pre-kindergarten through 5th grade: Haddam-Killingworth Intermediate School (grades 4-5, 280 students), Burr District Elementary School (grades K-3, 278 students), and Killingworth Elementary School (grades PK-3, 257 students). The district ranks 44th out of 153 Connecticut districts, earning a 4-star rating, and every school exceeded state proficiency averages in nearly all tested subjects in the most recent school year.
Among the three schools, Haddam-Killingworth Intermediate School stands out with the strongest current state ranking (130 out of 491 elementary schools) and the only available science proficiency data, with 68.8% of 5th graders proficient vs. 52.9% statewide. However, its 5th grade math proficiency (54.7%) is a notable weak spot compared to its 4th grade math (76.8%). Killingworth Elementary School boasts the best attendance in the district (4.7% chronic absenteeism vs. 16.4% statewide) and the lowest economic disadvantage (15.56% free/reduced lunch), while Burr District Elementary School had the strongest 3rd grade math in 2025-2026 (66.7% proficient) and the smallest class sizes at 10.9 students per teacher.
The most pressing concern is a sharp 20-point drop in district-wide 3rd grade math proficiency, from 81.8% to 61.8% between 2024-2025 and 2025-2026, affecting both K-3 schools. This likely reflects a cohort change or curriculum shift rather than a single school issue. Chronic absenteeism, meanwhile, is a clear strength across all three schools, with rates between 4.7% and 6.1%, far below the state average. While recent ranking data is only available for the intermediate school, all three schools have historically performed in the upper quartile of Connecticut elementary schools, making this district a reliable choice for families.
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