John Muir Charter
960 McCourtney Road Suite E, Grass Valley, CA 95949-7422
Summary
John Muir Charter is badly underperforming.
Reading and math results average to the 8th percentile among comparable California schools.
Only 20.0% of students met California's reading standard, but it is quickly trending up.
Math is weaker: 4.7% of students met California's math standard, but it is slowly trending up.
Proficiency stats
| Current Reading Proficiency | 20.0% |
| Current Math Proficiency | 4.7% |
| Reading State Rank | 1,560/1,734 (10th percentile) |
| Math State Rank | 1,640/1,735 (5th percentile) |
School information
| Student / Teacher Ratio | 15:1 |
| Student enrollment (2024–25) | 629 |
| Low-Income Students | 593 (94.3%) |
| English Learners | 174 (27.7%) |
Quick links
School Website
Great Schools
Niche
CAASPP| Admissions | Open enrollment |
|---|---|
| Charter school | Yes |
| Magnet school | No |
Test score trends
Reading rose 6.1 points from last year and rose 10.1 points over the full period. Math fell 1.6 points from last year and rose 3.3 points over the full period.
•Math +3.3 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
20.5% of tested students meet the reading standard in the grade shown. Overall, the school’s reading results rank No. 1,560 of 1,734 among California schools in the same grade-level category.
Low-Income vs Non-Low-Income
The 14.3-point reading income gap is slightly wider than the 10.8-point gap at a typical California 6–12 school. It narrowed over the period shown.
•English Learners vs English Native
0.0% of English learners meet the reading standard, compared with 23.5% of English-only students. The gap widened as English-learner results held steady and English-only results rose.
Math Proficiency Scores
2026 state test results
Race and Ethnicity
White students have the strongest math results at about 14% proficiency. The other reported groups range from about 3% to 3%.
Distribution of Scores by Grade
4.2% of tested students meet the math standard in the grade shown. Overall, the school’s math results rank No. 1,640 of 1,735 among California schools in the same grade-level category.
Low-Income vs Non-Low-Income
Low-income students are 5.1 points ahead in math. It narrowed over the period shown.
•
English Learners vs English Native
English-learner math proficiency held steady at 0.0%, while English-only results rose. The gap widened.
How we compare income gaps
“Typical” means the median gap across 67 schools for reading and 66 for math. The comparison uses 2026 California 6–12 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 John Muir Charter rank in California?
John Muir Charter ranks No. 1,560 of 1,734 in reading and No. 1,640 of 1,735 in math for 2026. These proficiency rankings compare California schools in the same grade-level category.
