Summary:
Zip code 06418 contains one middle school, Derby Middle School, which serves grades 6–8 and enrolls 300 students in the Derby School District. Because this is the only middle school in the area, the analysis centers on how the school compares with Connecticut state averages, its own district, and its performance trends over time. The school has earned 1 out of 5 stars in recent state rankings and sits at the 25th percentile of Connecticut middle schools, placing it at 193 out of 258 schools statewide.
In every tested subject and grade, Derby Middle School falls below the Connecticut state average. Mathematics is the weakest area: 6th grade proficiency is 21.8%, 7th grade is 15.4%, and 8th grade is just 14.0%, compared with state averages of roughly 42–44%. This leaves a gap of about 28 percentage points, meaning math proficiency rates are roughly one-third of the state average. English Language Arts scores range from 30.0% in 8th grade to 38.5% in 7th grade, with gaps of 14–21 points, while 8th grade science proficiency is 26.0% versus the state's 50.9%. The school also reports a chronic absenteeism rate of 25.0%, well above the state's 16.4%, and 62.33% of students qualify for free or reduced lunch, indicating a high-poverty student population that provides important context for these results.
Year-over-year trends are mixed. From 2024–25 to 2025–26, 6th and 7th grade ELA improved, and both 6th and 7th grade math improved, but 8th grade ELA dropped sharply from 49.5% to 30.0%, and 8th grade math slipped from 17.2% to 14.0%. Because Derby Middle School appears to be the only tested middle school in the Derby School District, its results drive the district's middle school profile. The school's statewide percentile ranking has gradually slipped from the 28th percentile in 2023–24 to the 25th percentile in 2025–26. Despite a favorable student–teacher ratio of 12.5 and spending of $16,138 per student, outcomes remain well below state averages, suggesting that socioeconomic factors and absenteeism strongly influence achievement.
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