Summary:
ZIP code 91801 has two public high schools serving grades 9–12 in Alhambra Unified: Mark Keppel High and Alhambra High. In 2025–2026, both schools scored above state proficiency levels in all three reported subjects. Their average proficiency was 72% in English language arts, 52% in math, and 56% in science, compared with state results of 49%, 38%, and 36%, respectively. The clearest difference between the schools is in math: their scores were 19 percentage points apart, compared with 4 points in ELA.
Mark Keppel High stands out at the top, leading Alhambra High in every subject: 74% versus 70% in ELA, 62% versus 42% in math, and 63% versus 50% in science. Alhambra’s math result was its relative weak spot, though it remained 4 points above the state and was 13 points below the district. Mark Keppel also had a higher graduation rate, 96% versus 94%, and lower chronic absenteeism, 2% versus 9%; both schools were below the state absenteeism rate of 18%.
Results improved in math and science at both schools from 2024–2025 to 2025–2026, while ELA moved in opposite directions: Mark Keppel’s ELA result fell by 1 point, and Alhambra’s rose by 4. Across the two schools, the average rose by 1 point in ELA, 4 in math, and 11 in science. SchoolDigger ranked Mark Keppel 165th of 2,137 schools (92nd percentile) and Alhambra 374th (82nd percentile) in 2025–2026. Both enroll about 2,000 students; Mark Keppel’s student-teacher ratio was 26, compared with 21.3 at Alhambra. For free/reduced lunch eligible students in 2024–2025, the reported shares were 41% at Mark Keppel and 48% at Alhambra; these figures describe school context, not a cause of achievement differences.
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