Summary:
ZIP code 91205 has four elementary schools in Glendale Unified, with differing grade spans; the supplied grade-specific results include sixth grade at Cerritos Elementary and John Muir Elementary. The latest all-grades results show a clear divide: Horace Mann Elementary and Muir are at or above state rates in ELA, math and science, while Cerritos and John Marshall Elementary are below state rates in all three. The most important takeaway is that performance is uneven across schools, rather than uniformly strong or weak across the area.
Mann leads ELA at 61% and math at 56%; Muir leads science at 49%, just ahead of Mann at 48%. The strongest-to-weakest gaps are substantial: 26 percentage points in ELA, 30 in math and 28 in science. The lowest-performing school depends on the subject: Marshall is lowest in ELA at 35% and science at 21%, while Cerritos is lowest in math at 26%. Muir is second in math at 50%, and its ELA rate of 51% is above the state’s 49%. These comparisons make Mann the broadest academic standout, with Muir particularly strong in science.
Recent results moved in different directions: the four-school average fell by 5 percentage points in ELA and 3 in math from 2024–2025 to 2025–2026, while science rose by 5 points. Mann still leads ELA and math despite declines in all three subjects; Muir’s science result rose by 21 points. SchoolDigger’s statewide rankings place Mann at the 78th percentile and Muir at the 70th in 2025–2026; Cerritos is at the 33rd and Marshall at the 29th. School context differs too: in 2024–2025, free/reduced lunch eligible shares ranged from 63% at Mann to 67% at Marshall, and in 2025–2026 chronic absenteeism was 9% at Mann versus 18% at Cerritos. These are useful observations, not explanations for academic results. Because the schools serve different grade spans, all-grades comparisons are not perfectly like-for-like.
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