Best Elementary Schools in Zip Code 06447

Zip code 06447 in Marlborough, CT is served by a single elementary school, Elmer Thienes-Mary Hall Elementary School, which enrolls students in grades PK through 6 and anchors the Marlborough School District. Because this is a single-school district, the school’s performance is directly responsible for the district’s 4-star rating and its 70th-percentile ranking (46th out of 153 districts) in Connecticut. The school itself has earned a solid 4-star rating for three consecutive years and currently ranks 109th out of 491 elementary schools statewide, placing it in the 78th percentile.

Academically, Elmer Thienes-Mary Hall consistently outperforms Connecticut state averages across nearly every grade and subject. In 2025–2026, average ELA proficiency in grades 3–6 was about 69.3%, compared to the state average of 50.7%, while average math proficiency in grades 4–6 was roughly 69.3% versus a 47.4% state average. The school’s strongest advantages appear in upper-grade math and science, such as 5th grade math (+32.0 points over the state) and 6th grade math (+33.0 points over the state). Science proficiency in 5th grade also remains high at 72.2%, well above the state’s 52.9%. Another standout metric is attendance: chronic absenteeism sits at just 5.3%, dramatically lower than the state average of 16.4%, indicating strong engagement and family support.

While outcomes are consistently strong, a few areas show notable year-over-year shifts. Third grade ELA improved sharply from 52.8% to 64.9% proficiency, while 4th grade math declined from 76.8% to 62.5%, and 6th grade math softened from 75.9% to 67.7%. The school benefits from favorable resources, including a low student-teacher ratio of 12.1:1, per-student spending of $16,414, and a relatively low free/reduced lunch eligibility rate of 18.56%. Overall, Elmer Thienes-Mary Hall Elementary School presents a picture of a high-achieving, stable learning environment with excellent attendance and strong academic performance, making it a standout option for families in the Marlborough area.