Summary:
Boston Green Academy Horace Mann Charter School (District) contains just one high school, Boston Green Academy Horace Mann Charter School, located at 20 Warren St. in Brighton, MA. It serves grades 7–12 and enrolls 426 students, so its MCAS results cover 7th, 8th and 10th grade plus end-of-course tests. Because the district has only this one school, district and school figures are identical for all test scores and graduation rates.
The school ranks near the bottom of Massachusetts. Its district rank is 343 of 351 schools, at the 2nd percentile with 0 stars, and its 2025–26 rank is 320 of 353, at the 9th percentile with 0 stars. Its best recent year was 2023–24, when it reached the 15th percentile with 1 star; it dropped in 2024–25 and recovered only slightly afterward.
Every reported 2025–26 subject and grade is below the state average. The relative bright spots are 8th-grade Civics at 23.19% proficient and 10th-grade English Language Arts at 21.31%. The clearest weakness is mathematics: 4.96% proficient for all grades against 41.11% statewide, and 7th-grade math at just 1.39%, the lowest reported value. Tenth graders outperform 7th and 8th graders in math and science. Year over year, ELA was nearly flat, Civics and Science declined slightly, and math fell sharply from 12.50% to 4.96%; Biology improved from 7.02% to 8.77%, though the grade grouping differs between years. The 2024–25 graduation rate is 82.5% and the dropout rate 17.5%. The student-teacher ratio is 10.2 and per-student spending was $17,474 in 2020–21; free/reduced-lunch data is not reported.
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