Summary:
ZIP code 02420 is home to four high-performing schools — three elementary schools and one middle school — serving about 2,124 students in the Lexington district, which ranks 6th of 351 Massachusetts districts at the 98th percentile with 5 stars. Every school here scores far above state averages in all subjects tested.
Two schools stand out. Wm Diamond Middle is the only middle school in the ZIP code and ranks 10th of 478 Massachusetts middle schools (98th percentile, 5 stars), with all-grade results of 73.74% ELA, 82.72% math, and 75.00% science. Joseph Estabrook is the top elementary school, ranking 18th of 899 (98th percentile, 5 stars) and posting the group's highest science score, 79.05%. Harrington (52nd of 899, 94th percentile) and Fiske (68th of 899, 92nd percentile) are also 5-star schools but sit below district averages in all three subjects; Fiske has nonetheless improved sharply from 148th in 2023-2024.
Math is the strongest subject at every school, exceeding ELA in each case. Science is the biggest differentiator: Estabrook sits at 79.05% versus Fiske at 61.02%, and both Harrington (-7.40 points) and Fiske (-7.99 points) posted notable science declines year over year. Fiske is the most unusual profile — smallest enrollment (324), lowest student-teacher ratio (9.1), and highest per-student spending ($25,331, from 2020-2021) — yet the lowest all-grade ELA and science, with excellent 3rd grade results but weaker 5th grade. Estabrook has the highest elementary student-teacher ratio (11.2) yet the strongest elementary outcomes, showing that staffing ratios alone do not predict results here.
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