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Email BoardDelta Charter Online
31400 South Koster Road, Tracy, CA 95304-8824
Summary
Delta Charter Online is badly underperforming.
Reading and math results average to the 39th percentile among comparable California schools.
Only 39.5% of students met California's reading standard, but it is trending up.
Math is weaker: 18.5% of students met California's math standard, but it is trending up slightly.
Proficiency stats
| Current Reading Proficiency | 39.5% |
| Current Math Proficiency | 18.5% |
| Reading State Rank | 1,069/1,596 (33rd percentile) |
| Math State Rank | 881/1,596 (45th percentile) |
School information
| Student / Teacher Ratio | 21:1 |
| Student enrollment (2024–25) | 282 |
| Low-Income Students | 166 (58.9%) |
| English Learners | 30 (10.6%) |
School Website
Great Schools
Niche
Ed-Data
CAASPP| Admissions | Open enrollment |
|---|---|
| Charter school | Yes |
| Magnet school | No |
Test score trends
Reading fell 1.4 points from last year and rose 8.2 points over the full period. Math fell 6.0 points from last year and rose 2.4 points over the full period.
•Math +2.4 percentage points (2024–2026)Reading Proficiency Scores
2026 state test results
Race and Ethnicity
White and Hispanic or Latino students have the strongest results.
Distribution of Scores by Grade
39.5% of tested students meet the reading standard in the grade shown. Overall, the school’s reading results rank No. 1,069 of 1,596 among California schools in the same grade-level category.
Low-Income vs Non-Low-Income
Low-income students are 3.1 points ahead 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
2026 state test results
Race and Ethnicity
White students have the strongest math results at about 24% proficiency. The other reported groups range from about 13% to 13%.
Distribution of Scores by Grade
18.5% of tested students meet the math standard in the grade shown. Overall, the school’s math results rank No. 881 of 1,596 among California schools in the same grade-level category.
Low-Income vs Non-Low-Income
The 0.7-point math income gap is narrower than the 14.2-point gap at a typical California 9–12 school. 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.
How we compare income gaps
“Typical” means the median gap across 876 schools for reading and 882 for math. The comparison uses 2026 California 9–12 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 Charter Online compare within the district?
Delta Charter Online is No. 2 in both reading and math proficiency among the 2 9–12 schools in New Jerusalem Elementary with 2026 results.
Explore the district’s schoolsHow does Delta Charter Online rank in California?
Delta Charter Online ranks No. 1,069 of 1,596 in reading and No. 881 of 1,596 in math for 2026. These proficiency rankings compare California schools in the same grade-level category.
How do low-income students at Delta Charter Online compare within the district?
Low-income students here rank No. 2 in both subjects among 2 9–12 district schools with reportable 2026 results for this group. 40.9% meet the reading standard and 18.2% meet the math standard.
See results by student groupHow does Delta Charter Online compare with other schools in Tracy?
Delta Charter Online is No. 5 in both reading and math proficiency among the 5 9–12 schools in Tracy with 2026 results.
Explore schools in TracyHow does Delta Charter Online compare with other schools in San Joaquin County?
Delta Charter Online is No. 29 in reading and No. 22 in math proficiency among the 31 9–12 schools in San Joaquin County with 2026 results.
Explore schools in San Joaquin CountyWhich schools should I compare?
Schools serving 9–12 in the same district or city.
| School | Math | Reading |
|---|---|---|
| Delta Charter OnlineThis school | 18.5% | 39.5% |
| Insight @ San Joaquin | 40.8% | 39.8% |
| John C. Kimball High | 44.7% | 70.9% |
