Columbia Union
Tuolumne County school performance
Columbia Union is badly underperforming.
Reading and math results average to the 24th percentile among California school districts.
Only 32.5% of students met California's reading standard, and it is trending down.
Math is weaker: 21.3% of students met California's math standard, and it is trending down.
| Current Reading Proficiency | 32.5% |
| Current Math Proficiency | 21.3% |
| District Reading Rank | 760 / 977 (22nd percentile) |
| District Math Rank | 733 / 977 (25th percentile) |
| Student / Teacher Ratio | 17:1 |
| Spend per Student | $17,910 |
| Schools in District | 1 |
| Student Enrollment | 464 |
| Low-Income Students | 304 (65.2%) |
| English Learners | 12 (2.6%) |
District Website
Great Schools
Niche
Ed-Data
CAASPPTest score trends
Reading fell 9.1 points from last year and fell 5.2 points over the full period. Math fell 9.1 points from last year and fell 9.8 points over the full period.
•Math -9.8 percentage pointsBoard Members
| name | elected | up for re-election |
|---|---|---|
Erik Segerstrom Board President | 2024 | 2028 |
Jamie Serrano Board Clerk | N/A | N/A |
Cody Opie Board Member | 2024 | 2028 |
Dr. Jeff Wittman Board Member | N/A | N/A |
Tom Stewart Board Member | N/A | N/A |
Expand for details on low-income and english learner performance
Reading Proficiency Scores
Comparison of low-income and English learner groups using district-level CAASPP proficiency data.
Low-Income vs Non-Low-Income
Low-income students trail other students by 13.0 points in reading. It narrowed over the period shown.
•English Learners vs English Native
Results for both language groups are unavailable, so a current reading gap cannot be calculated.
Math Proficiency Scores
Comparison of low-income and English learner groups using district-level CAASPP proficiency data.
Low-Income vs Non-Low-Income
Low-income students trail other students by 16.0 points in math. It narrowed over the period shown.
•English Learners vs English Native
Results for both language groups are unavailable, so a current math gap cannot be calculated.
District School Map
Schools in this district, color-coded by reading proficiency.
Loading district map...
Hover over a school marker to see details
Schools
Understanding this district
How does Columbia Union rank in California?
Columbia Union ranks No. 760 of 977 in reading and No. 733 of 977 in math for 2026. These proficiency rankings compare districts across all district types.
How do low-income students in Columbia Union compare with other districts?
Low-income reading proficiency is 27.2%, compared with 37.6% at a typical California elementary district. In math, it is 14.8%, compared with 28.2%.
See student-group resultsWhich districts should I compare with Columbia Union?
Elementary districts in Tuolumne County. Peers have the closest enrollment sizes.
| District | Math | Reading |
|---|---|---|
| Columbia UnionThis district | 21.3% | 32.5% |
| Summerville Elementary | 21.4% | 46.8% |
| Jamestown Elementary | 20.1% | 32.5% |
How we compare low-income results
“Typical” is the median across 444 California elementary districts with 2026 results, a reported low-income population, and at least 20 low-income tested students in each subject. Each district counts once. This compares proficiency for low-income students, rather than the gap between income groups.
