Summary:
San Antonio Union Elementary has one listed school, San Antonio Elementary, serving kindergarten through grade 8, with 134 students. In 2025–2026, its all-grade ELA proficiency was 43%, compared with 49% statewide, and mathematics was 38%, nearly matching California’s 38%. The clearest concern is science: 17% of students were proficient, 19 percentage points below the state’s 36%.
There is no school-to-school comparison in this area: San Antonio Elementary is both the highest- and lowest-performing school in the list. Grade-level results show where performance stands out within the school: grade 3 was above the state in ELA, at 58% versus 44%, and mathematics, at 58% versus 47%. Grade 8 was below the state in all three subjects: ELA was 38% versus 49%, mathematics was 23% versus 36%, and science was 8% versus 35%. The largest grade-level gap was grade 8 science, 28 points below California.
Results improved over time in ELA and mathematics, but not enough to close every gap. From 2024–2025 to 2025–2026, ELA rose from 26% to 43%, narrowing its gap with the state by 17 points; mathematics rose from 33% to 38%, narrowing its gap by 3 points. Science increased from 16% to 17%, while the state’s result rose more, widening the school’s shortfall by 2 points. SchoolDigger’s ranking also climbed, from the 8th percentile and 0 stars in 2023–2024 to the 55th percentile and 3 stars in 2025–2026. As context, the school’s student-teacher ratio was 14.8 in 2024–2025, and 40% of students were free/reduced lunch eligible that year.
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