Summary:
Regional School District 17 is served by a single public middle school, Haddam-Killingworth Middle School, located in Killingworth, Connecticut, which enrolls 423 students in grades 6 through 8. The district overall is ranked 44th out of 153 Connecticut districts, placing it in the 71st percentile, and the school has maintained a 4-star rating over the past three school years. Its state ranking improved sharply from 54th in 2023-2024 to 33rd in 2024-2025 before settling at 72nd for 2025-2026, still placing it in the top 28% of middle schools statewide.
Academically, the school consistently outperforms Connecticut averages. In the most recent testing year, ELA proficiency ranged from 60.8% in grade 7 to 67.2% in grade 8, well above the state's roughly 51% average. Math proficiency ranged from 52.3% in grade 8 to 65.2% in grade 6, versus a state average near 43%. Eighth-grade science proficiency reached 57.8%, topping the state's 50.9%. However, the school saw across-the-board declines from the prior year in every tested subject and grade, most sharply in grade 6 ELA (-14.8 points), grade 7 ELA (-12.1 points), grade 8 math (-11.9 points), and 8th-grade science (-11.7 points), even as Connecticut state averages generally improved. Grade 8 ELA remains a standout strength, finishing more than 16 points above the state average.
Beyond test scores, the school reports a favorable 11.2-to-1 student-teacher ratio, which supports individualized instruction, and per-student spending of $17,295, though that figure dates to 2018-2019. Chronic absenteeism stands at 11.1%, well below the statewide rate of 16.4% but notably higher than the district's own 7.7%. About 15.6% of students qualify for free or reduced-price lunch, reflecting a comparatively affluent student body. One pattern worth watching is math proficiency, which declines as students progress from 6th grade (65.2%) to 8th grade (52.3%), suggesting middle-school math is an area to monitor alongside attendance.
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