Summary:
ZIP code 01033 has just one high school, Granby Junior Senior High School, so families here have a single option rather than a choice among schools. It serves grades 7 through 12 with about 290 students, is part of the Granby district, and runs an 11:1 student-teacher ratio — small-school conditions worth noting, especially since its MCAS results blend middle-school grades with high-school courses.
Results are mixed. The school reports a 100% graduation rate and a 0% dropout rate for 2024–2025, and it spent $17,069 per student in 2020–2021, the only spending year reported, which is older than the test data. Statewide, it improved from 259 of 349 (26th percentile, 1 star) in 2024–2025 to 242 of 353 (31st percentile, 2 stars) in 2025–2026, still below its 2023–2024 peak of 164 of 348 (53rd percentile, 3 stars).
Academically, the school trails Massachusetts in every reported 2025–2026 MCAS subject and grade. The largest gaps are 8th-grade math (22.41 vs 41.67 state), 8th-grade civics (22.03 vs 39.77), Biology end-of-course (20.59 vs 37.68) and 10th-grade science (25.00 vs 40.50). The narrowest gaps, still below state, are 10th-grade ELA (39.02 vs 45.48), 7th-grade math (30.91 vs 37.48) and 8th-grade science (32.20 vs 38.93). Encouragingly, all-grade ELA, math and science scores rose year over year (+2.19, +7.11 and +10.20 points), while 8th-grade civics fell from 28.00 to 22.03. The school also edges the district in most individual grade and course comparisons, even though district all-grade averages are higher.
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