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Email BoardExcelsior Middle
14301 Byron Highway, Byron, CA 94514-2515
Summary
Excelsior Middle is underperforming.
Reading and math results average to the 49th percentile among comparable California schools.
Only 43.2% of students met California's reading standard, but it is trending up slightly.
Math is weaker: 29.5% of students met California's math standard, and it is trending down slightly.
Proficiency stats
| Current Reading Proficiency | 43.2% |
| Current Math Proficiency | 29.5% |
| Reading State Rank | 617/1,204 (49th percentile) |
| Math State Rank | 615/1,204 (49th percentile) |
School information
| Student / Teacher Ratio | 19:1 |
| Student enrollment (2024–25) | 377 |
| Low-Income Students | 125 (33.2%) |
| English Learners | 21 (5.6%) |
School Website
Great Schools
Niche
Ed-Data
CAASPP| Admissions | Open enrollment |
|---|---|
| Charter school | No |
| Magnet school | No |
Test score trends
Reading fell 6.2 points from last year and rose 2.3 points over the full period. Math fell 5.0 points from last year and fell 2.0 points over the full period.
•Math -2.0 percentage points (2024–2026)Reading Proficiency Scores
2026 state test results
Race and Ethnicity
Asian and White students have the strongest results.
Distribution of Scores by Grade
The share meeting the reading standard ranges from 36.4% to 48.3% across the grades shown. Overall, the school’s reading results rank No. 617 of 1,204 among California schools in the same grade-level category.
Low-Income vs Non-Low-Income
The 22.4-point reading income gap is slightly wider than the 19.5-point gap at a typical California 6–8 school. It widened over the period shown.
•English Learners vs English Native
5.3% of English learners meet the reading standard, compared with 45.4% of English-only students. The gap narrowed as English-learner results rose and English-only results rose.
•Math Proficiency Scores
2026 state test results
Race and Ethnicity
Two or more races students have the strongest math results at about 35% proficiency. The other reported groups range from about 26% to 33%.
Distribution of Scores by Grade
The share meeting the math standard ranges from 21.5% to 34.7% across the grades shown. Overall, the school’s math results rank No. 615 of 1,204 among California schools in the same grade-level category.
Low-Income vs Non-Low-Income
The 22.9-point math income gap is slightly wider than the 19.2-point gap at a typical California 6–8 school. It widened slightly over the period shown.
•English Learners vs English Native
0.0% of English learners meet the math standard, compared with 32.3% of English-only students. The gap widened as English-learner results fell and English-only results rose.
•Progress as students move up
2023–2026
How we compare income gaps
“Typical” means the median gap across 795 schools for reading and 796 for math. The comparison uses 2026 California 6–8 schools with at least 20 tested students in each income group and a reported low-income student population. Each school counts once. Its gap is non-low-income proficiency minus low-income proficiency, including negative gaps. California state test data
Understanding this school
How does Excelsior Middle rank in California?
Excelsior Middle ranks No. 617 of 1,204 in reading and No. 615 of 1,204 in math for 2026. These proficiency rankings compare California schools in the same grade-level category.
How does Excelsior Middle compare with other schools in Contra Costa County?
Excelsior Middle is No. 24 in both reading and math proficiency among the 37 6–8 schools in Contra Costa County with 2026 results.
Explore schools in Contra Costa County