Summary:
Columbia Union has one listed school, Columbia Elementary, serving grades K–8 with 464 students. In 2025–2026, its all-grades ELA result was 33% and math was 21%, each about 17 percentage points below California; science was 45%, 9 points above the state. The most important finding is this clear split: science is a relative strength, while ELA and math lag substantially.
There is no school-to-school top or bottom to compare because only one school is listed. Within the school, science stands out: eighth-grade science was 50%, 15 points above California, and fifth-grade science was 41%, 6 points above. Math is the weakest area, particularly in sixth grade, where 8% met the reported result compared with 37% statewide, a 29-point gap. ELA also varies by grade: fifth grade was 41%, 8 points below the state, while third grade was 21%, 23 points below.
Results shifted in different directions between 2024–2025 and 2025–2026: all-grades ELA and math each fell 9 points, while science rose 12 points, moving from essentially level with California to 9 points above. The ELA and math gaps widened by 10 points each. SchoolDigger’s ranking declined from the 37th percentile in 2023–2024 to the 29th in 2025–2026, and its rating went from 2 stars to 1 star. Other context measures: the student–teacher ratio was 17.2 in 2024–2025, and 65% of students were free/reduced lunch eligible that year. In 2025–2026, chronic absenteeism was 23%, versus 18% statewide.
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