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Email BoardMueller Charter (Robert L.)
715 I Street, Chula Vista, CA 91910-5112
Summary
Mueller Charter (Robert L.) is underperforming.
Reading and math results average to the 69th percentile among comparable California schools.
50.6% of students met California's reading standard, and it is holding steady.
Math is weaker: 41.5% of students met California's math standard, but it is slowly trending up.
Proficiency stats
| Current Reading Proficiency | 50.6% |
| Current Math Proficiency | 41.5% |
| Reading State Rank | 587/1,734 (66th percentile) |
| Math State Rank | 501/1,735 (71st percentile) |
School information
| Student / Teacher Ratio | 23:1 |
| Student enrollment (2024–25) | 1,542 |
| Low-Income Students | 1,197 (77.8%) |
| English Learners | 638 (41.5%) |
School Website
Great Schools
Niche
Ed-Data
CAASPP| Admissions | Open enrollment |
|---|---|
| Charter school | Yes |
| Magnet school | No |
Test score trends
Reading fell 1.3 points from last year and rose 0.1 points over the full period. Math rose 4.6 points from last year and rose 4.0 points over the full period.
•Math +4.0 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
The share meeting the reading standard ranges from 38.3% to 60.2% across the grades shown. Overall, the school’s reading results rank in the top 34% among California schools in the same grade-level category.
Low-Income vs Non-Low-Income
The 1.3-point reading income gap is narrower than the 11.6-point gap at a typical California K–12 school. It narrowed slightly over the period shown.
•
English Learners vs English Native
19.6% of English learners meet the reading standard, compared with 59.0% of English-only students. The gap widened as English-learner results fell and English-only results held steady.
•Math Proficiency Scores
2026 state test results
Race and Ethnicity
White students have the strongest math results at about 52% proficiency. The other reported groups range from about 40% to 40%.
Distribution of Scores by Grade
The share meeting the math standard ranges from 33.6% to 50.0% across the grades shown. Overall, the school’s math results rank in the top 29% among California schools in the same grade-level category.
Low-Income vs Non-Low-Income
The 4.1-point math income gap is narrower than the 10.8-point gap at a typical California K–12 school. It widened slightly over the period shown.
•English Learners vs English Native
25.0% of English learners meet the math standard, compared with 51.0% of English-only students. The gap widened as English-learner results rose and English-only results rose.
•Progress as students move up
2023–2026
How we compare income gaps
“Typical” means the median gap across 249 schools for reading and 251 for math. The comparison uses 2026 California K–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 Mueller Charter (Robert L.) compare within the district?
Mueller Charter (Robert L.) is No. 3 in reading and No. 1 in math proficiency among the 3 K–12 schools in Chula Vista Elementary with 2026 results.
Explore the district’s schoolsHow does Mueller Charter (Robert L.) rank in California?
Mueller Charter (Robert L.) ranks No. 587 of 1,734 in reading and No. 501 of 1,735 in math for 2026. These proficiency rankings compare California schools in the same grade-level category.
How do low-income students at Mueller Charter (Robert L.) compare within the district?
Low-income students here rank No. 3 in reading and No. 1 in math among 3 K–12 district schools with reportable 2026 results for this group. 50.2% meet the reading standard and 40.2% meet the math standard.
See results by student groupHow does Mueller Charter (Robert L.) compare with other schools in Chula Vista?
Mueller Charter (Robert L.) is No. 3 in reading and No. 1 in math proficiency among the 3 K–12 schools in Chula Vista with 2026 results.
Explore schools in Chula VistaHow does Mueller Charter (Robert L.) compare with other schools in San Diego County?
Mueller Charter (Robert L.) is No. 16 in reading and No. 8 in math proficiency among the 33 K–12 schools in San Diego County with 2026 results.
Explore schools in San Diego CountyWhich schools should I compare?
Schools serving K–12 in the same district.
| School | Math | Reading |
|---|---|---|
| Mueller Charter (Robert L.)This school | 41.5% | 50.6% |
| Chula Vista Learning Community Charter | 40.0% | 61.1% |
| Learning Choice Academy - Chula Vista | 32.2% | 56.6% |
