Regional School District 15

Regional School District 15 serves the Connecticut towns of Southbury and Middlebury, with 7 schools—4 elementary schools (PK–5), 2 middle schools (6–8), and 1 high school (9–12)—enrolling 3,345 students and ranking 59th out of 153 Connecticut districts overall. Gainfield Elementary School is the clear standout, ranking 33rd out of 491 elementary schools with a 5-star rating and roughly 81% average proficiency, far above district and state averages, while also posting the district's lowest chronic absenteeism rate at 3.1%. Pomperaug Regional High School is another flagship, ranking 16th out of 145 high schools with a 97.9% graduation rate, though its 13.3% chronic absenteeism rate exceeds the district average of 9.0%.

Among the middle schools, Rochambeau Middle School ranks higher than Memorial Middle School (63rd vs. 83rd) with stronger 6th and 7th grade scores, but Memorial excels in 8th grade, posting the district's best science score at 80.8% proficiency. There is a wide performance gap among elementary schools: Gainfield averages about 81% proficiency while Middlebury Elementary School averages about 63.5%, and Middlebury also has the highest economic need in the district at 19.1% free/reduced-price lunch.

Long Meadow Elementary School is the most improved school, jumping from 208th to 134th in ranking with dramatic gains in 3rd grade ELA (50% to 71.9%) and math (54.9% to 75.0%). Science is a districtwide strength, with scores well above state averages at every grade level—for example, 5th grade science exceeds 80% at both Gainfield and Pomperaug Elementary School, compared to 52.9% statewide. Spending does not clearly predict performance: Pomperaug Elementary spends the most per student ($20,272) but ranks 155th, while Gainfield spends below the district average. The main areas to watch are the elementary performance gap, Memorial's 7th grade decline, and high school chronic absenteeism.