Regional School District 10

Regional School District 10 serves the Burlington and Harwinton, Connecticut area with 2,123 students across four schools: two PK–4 elementary schools, one 5–8 middle school, and one 9–12 high school. The district is rated 4 stars and ranks 38th of 153 Connecticut districts (75th percentile), with every school performing at or above state averages.

Harwinton Consolidated School is the district's standout elementary school, earning 5 stars and ranking 46th of 491 elementary schools (91st percentile) — a dramatic jump from the 70th percentile just two years earlier. It outperforms Lake Garda Elementary School on every test; for example, 3rd grade math proficiency is 82.4% at Harwinton versus 70.8% at Lake Garda. This is especially notable because Harwinton serves a higher percentage of economically disadvantaged students (20.9%) than Lake Garda (11.6%), yet achieves stronger results. Lake Garda, while ranking 173rd of 491 (65th percentile), remains above state averages, but its 3rd grade ELA proficiency of 52.8% lags the district's other elementary school by nearly 23 points. Harwinton also benefits from a smaller student-teacher ratio (11.9 vs. 13.9) and slightly higher per-student spending.

At the secondary level, Lewis S. Mills High School ranks 19th of 133 high schools (86th percentile) with a 98.3% graduation rate and strong SAT scores, though its 11.8% chronic absenteeism rate is roughly double the district average of 6.0%. Har-Bur Middle School is consistently strong at the 78th percentile with a very low 4.8% chronic absenteeism rate. Across the district, math proficiency is a strength in elementary grades but fades relative to ELA by high school. Harwinton's 4th grade math proficiency improved 12.3 points in one year, and the two secondary schools share a campus in Burlington, which may support smooth transitions and coordinated curriculum alignment.