Summary
John H. Glenn High is a 9–12 school in Norwalk, California, serving 882 students in the Norwalk-La Mirada Unified area. Its most important academic challenge is that test proficiency remains below the average at nearby comprehensive high schools in all three subjects, with the widest local gap in science.
ELA is Glenn’s strongest subject relative to state and district results: 47% of students met proficiency, just 2 percentage points below both comparisons. Math proficiency was 21%, 17 points below the state and 15 below the district; science was also 21%, 15 points below the state and 13 below the district. Compared with five nearby comprehensive high schools, Glenn was 22 points below their average in ELA, 18 below in math, and 24 below in science. Completion is a brighter spot: the graduation rate was 95%, 7 points above the state and 2 above the district, though nearby comprehensive schools posted higher rates. Chronic absenteeism is a concern: 26% of Glenn students were chronically absent, compared with 18% statewide and in the district, and each nearby comprehensive school had a lower rate.
Scores have risen substantially since 2022–2023: ELA gained 22 percentage points, math 15, and science 12. The gap with the state narrowed most in ELA, by 19 points, though math and science remain low; math eased after its earlier rise, and science dipped in the latest year. SchoolDigger placed Glenn at the 41st statewide percentile and awarded it 2 stars in 2025–2026. Its student-teacher ratio was 18.4 in 2024–2025, lower than the ratios at nearby comprehensive schools, and 75% of students were free/reduced lunch eligible that school year. SchoolDigger’s measure of how well a school serves a student group compared with that group at other schools put Homeless Students at the 77th percentile, 36 points above Glenn’s overall standing. Its Special Education Students ranking rose from the 5th percentile in 2024–2025 to the 55th in 2025–2026, a sharp change that should not be taken as a stable pattern on its own.
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