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Email BoardDelta Keys Charter
31400 South Koster Road, Tracy, CA 95304-8824
Summary
Delta Keys Charter is badly underperforming.
Reading and math results average to the 29th percentile among comparable California schools.
Only 21.1% of students met California's reading standard, but it is trending up.
Math is weaker: 15.4% of students met California's math standard, but it is trending up slightly.
Proficiency stats
| Current Reading Proficiency | 21.1% |
| Current Math Proficiency | 15.4% |
| Reading State Rank | 1,272/1,596 (20th percentile) |
| Math State Rank | 982/1,596 (39th percentile) |
School information
| Student / Teacher Ratio | 15:1 |
| Student enrollment (2024–25) | 125 |
| Low-Income Students | 91 (72.8%) |
| English Learners | 24 (19.2%) |
School Website
Great Schools
Niche
Ed-Data
CAASPP| Admissions | Open enrollment |
|---|---|
| Charter school | Yes |
| Magnet school | No |
Test score trends
Reading fell 7.9 points from last year and rose 5.5 points over the full period. Math fell 21.0 points from last year and rose 2.9 points over the full period.
•Math +2.9 percentage points (2024–2026)Reading Proficiency Scores
2026 state test results
Race and Ethnicity
Only one group has a reportable reading result.
Distribution of Scores by Grade
21.1% of tested students meet the reading standard in the grade shown. Overall, the school’s reading results rank No. 1,272 of 1,596 among California schools in the same grade-level category.
Low-Income vs Non-Low-Income
Results for both income groups are unavailable, so a current reading gap cannot be calculated.
•English Learners vs English Native
14.3% of English learners meet the reading standard, compared with 16.7% of English-only students. The gap widened as English-learner results fell and English-only results fell.
•Math Proficiency Scores
2026 state test results
Race and Ethnicity
Only one group has a reportable math result.
Distribution of Scores by Grade
15.4% of tested students meet the math standard in the grade shown. Overall, the school’s math results rank No. 982 of 1,596 among California schools in the same grade-level category.
Low-Income vs Non-Low-Income
Results for both income groups are unavailable, so a current math gap cannot be calculated.
•English Learners vs English Native
14.3% of English learners meet the math standard, compared with 13.3% of English-only students. The gap narrowed as English-learner results fell and English-only results fell.
•How we compare income gaps
“Typical” means the median gap across 12 schools for reading and 12 for math. The comparison uses 2026 California 10–12 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 Delta Keys Charter rank in California?
Delta Keys Charter ranks No. 1,272 of 1,596 in reading and No. 982 of 1,596 in math for 2026. These proficiency rankings compare California schools in the same grade-level category.
How does Delta Keys Charter compare with other schools in San Joaquin County?
Delta Keys Charter is No. 1 in both reading and math proficiency among the 4 10–12 schools in San Joaquin County with 2026 results.
Explore schools in San Joaquin County