Serving 1,542 students in grades Kindergarten-12, Mueller Charter (Robert L.) ranks in the top 50% of all schools in California for overall test scores (math proficiency is top 50%, and reading proficiency is top 50%).
The percentage of students achieving proficiency in math is 36% (which is higher than the California state average of 34%). The percentage of students achieving proficiency in reading/language arts is 49% (which is higher than the California state average of 47%).
The student-teacher ratio of 23:1 is higher than the California state level of 21:1.
Minority enrollment is 96% of the student body (majority Hispanic), which is higher than the California state average of 80% (majority Hispanic).
Quick Facts (2026)
- School Type: Charter School
- Grades: Kindergarten-12
- Enrollment: 1,542 students
- Student-Teacher Ratio: 23:1
- Minority Enrollment: 96%
- Graduation Rate: ≥95% (Top 20% in CA)
- Overall Testing Rank: Top 50%
- Math Proficiency: 36% (Top 50%)
- Reading Proficiency: 49% (Top 50%)
- Science Proficiency: 26% (Top 50%)
- Source: National Center for Education Statistics (NCES), CA Dept. of Education
Top Rankings
Mueller Charter (Robert L.) ranks among the top 20% of public schools in California for:
Category
Attribute
Graduation Rate
School Overview
Mueller Charter (Robert L.)'s student population of 1,542 students has declined by 8% over five school years.
The teacher population of 67 teachers has stayed relatively flat over five school years.
School Type
Grades Offered
Grades Kindergarten-12
Total Students
1,542 students
Total Classroom Teachers
67 teachers
Year Founded
1993
Colors
Blue and Gold
School Calendar
School Rankings
Mueller Charter (Robert L.) ranks within the top 50% of all 9,523 schools in California (based off of combined math and reading proficiency testing data).
The diversity score of Mueller Charter (Robert L.) is 0.15, which is less than the diversity score at state average of 0.63. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#3623 out of 9523 schools
(Top 50%)
(Top 50%)
Math Test Scores (% Proficient)
36%
34%
Reading/Language Arts Test Scores (% Proficient)
49%
47%
Science Test Scores (% Proficient)
26%
29%
Student-Teacher Ratio
23:1
21:1
Asian
1%
12%
Hispanic
92%
56%
Black
1%
5%
White
4%
20%
Two or more races
2%
6%
All Ethnic Groups
Graduation Rate
≥95%
87%
Eligible for Free Lunch
66%
54%
Eligible for Reduced Lunch
11%
8%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), CA Dept. of Education
Frequently Asked Questions
What is Mueller Charter (Robert L.)'s ranking?
Mueller Charter (Robert L.) is ranked #3623 out of 9,523 schools, which ranks it among the top 50% of public schools in California.
What schools are Mueller Charter (Robert L.) often compared to?
Mueller Charter (Robert L.)is often viewed alongside schools like Chula Vista Learning Community Charter by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
36% of students have achieved math proficiency (compared to the 34% CA state average), while 49% of students have achieved reading proficiency (compared to the 47% CA state average).
What is the graduation rate of Mueller Charter (Robert L.)?
The graduation rate of Mueller Charter (Robert L.) is 95%, which is higher than the California state average of 87%.
How many students attend Mueller Charter (Robert L.)?
1,542 students attend Mueller Charter (Robert L.).
What is the racial composition of the student body?
92% of Mueller Charter (Robert L.) students are Hispanic, 4% of students are White, 2% of students are Two or more races, 1% of students are Asian, and 1% of students are Black.
What is the student-teacher ratio of Mueller Charter (Robert L.)?
Mueller Charter (Robert L.) has a student ration of 23:1, which is higher than the California state average of 21:1.
What grades does Mueller Charter (Robert L.) offer ?
Mueller Charter (Robert L.) offers enrollment in grades Kindergarten-12
What school district is Mueller Charter (Robert L.) part of?
Mueller Charter (Robert L.) is part of Mueller Charter (Robert L.) School District.
School Reviews
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