Summary:
The Grossmont Union High area includes 14 high schools: 13 serve grades 9–12, while Grossmont Middle College High serves grades 11–12; enrollments range from 37 to 2,331 students. The clearest finding is how widely school results differ: all-grades ELA scores span 93 percentage points, math 50 points, and science 81 points; even among the nine larger 9–12 schools, the gaps are 46, 37, and 30 points, respectively.
Grossmont Middle College High leads all three subjects, with 96% proficient in ELA, 52% in math, and 81% in science. Its results are exceptional, but it serves only grades 11–12 and enrolls 37 students. Among larger schools, West Hills High leads ELA at 68%, 19 percentage points above the state; Santana High leads math at 46% and science at 46%, respectively 8 and 10 points above the state. At the lower end, Chaparral High has the lowest ELA score, 3%, and science score, 0%; IDEA Center has the lowest math score, 2%. Across the 12 schools with scores, the average is 50% in ELA, 27% in math, and 33% in science, compared with state averages of 49%, 38%, and 36%.
Results moved in different directions from 2024–2025 to 2025–2026: the school average was nearly flat in ELA, fell 2 points in math, and rose 4 points in science. The math decline was heavily influenced by Middle College, where the score fell 35 points; without it, the other schools’ math average rose 1 point. SchoolDigger ranks Middle College 67th of 2,137 schools (97th percentile, 5 stars) and Chaparral 2,085th (2nd percentile, 0 stars); these are SchoolDigger rankings, not state rankings. All schools report free/reduced lunch eligible figures for 2024–2025, ranging from 27% at Middle College to 89% at El Cajon Valley High; these figures are context, not an explanation for results. MERIT Academy’s test scores are suppressed, and Elite Academy has no test-score entries in the supplied data.
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