Summary:
High schools in ZIP code 91711 include two schools in Claremont Unified: Claremont High, serving grades 9–12, and San Antonio High (Continuation), serving grades 10–12. In 2025–2026, their simple average was 48% in English, 28% in math, and 37% in science, compared with state results of 49%, 38%, and 36%. Math is the clearest area-wide weakness, but the averages mask a sharp divide: the most important finding is that Claremont was above the state in all three subjects while San Antonio was below it in all three.
Claremont High stands out at the top: 76% met the English standard, 52% math, and 59% science—about 27, 13, and 23 percentage points above the state, respectively. San Antonio High had 19% in English, 5% in math, and 15% in science, about 30, 34, and 21 points below the state. The gap between the schools was 57 points in English, 47 in math, and 44 in science. Other reported outcomes show a similar contrast: graduation was 98% at Claremont and 72% at San Antonio, versus 88% statewide; dropout was 1%, 20%, and 8%, respectively. Chronic absenteeism was 18% at Claremont and 70% at San Antonio, compared with 18% statewide.
Recent test trends were mixed rather than a broad turnaround. From 2024–2025 to 2025–2026, Claremont’s English result stayed about 76%, math fell from 55% to 52%, and science rose from 58% to 59%. San Antonio’s English result fell from 24% to 19%, while math rose from 0% to 5% and science from 11% to 15%—gains from low starting points, with results still below the state. SchoolDigger rated Claremont 4 stars and placed it at the 90th percentile in 2025–2026; San Antonio had 1 star and ranked at the 18th percentile. In 2024–2025, student-teacher ratios were 22.5 at Claremont and 12.4 at San Antonio; free/reduced lunch eligible shares were 35% and 57%, respectively. These are context, not explanations of school results; the schools differ in grade span, and San Antonio is a small continuation school.
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