Summary:
ZIP code 02135 in Brighton, Massachusetts contains three high schools: Brighton High School (grades 7–12, 667 students) and Lyon High School (grade 12 only, 95 students), both part of the Boston district, and Boston Green Academy Horace Mann Charter School (grades 7–12, 426 students), which is its own charter district. All three rank in the bottom decile of Massachusetts schools in their latest reported years, so families should read the differences below as relative, not absolute.
The three schools contrast sharply depending on which measure you weigh. Lyon posts the strongest graduation profile — an 89.5% graduation rate and 5.3% dropout rate, both better than the Boston district's 81.3% and 8.8% — plus the smallest classes (student–teacher ratio 6.7) and the highest per-student spending ($38,527 in 2020–2021). Yet Lyon's test results and rank are the weakest of the group, and it serves only grade 12 while reporting 10th-grade MCAS scores, making them hard to compare. Brighton High, the largest school, has the toughest outcomes: a 61.8% graduation rate, 27.2% dropout rate, and 0% proficiency in 10th-grade Science in 2025–2026. Boston Green Academy holds the best latest rank percentile (9th), the highest 10th-grade ELA score in the group (21.31%), and the top 8th-grade Civics result (23.19%), but its all-grades Math proficiency is only 4.96% and 7th-grade Math just 1.39%.
Across all three schools, every reported subject falls below state averages, often by 25–45 percentage points. Note also that spending figures are from 2020–2021, free/reduced-lunch data are blank for all three, and Lyon's small enrollment makes its percentages volatile — so treat these numbers as a starting point for school visits and conversations rather than a complete picture.
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