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Email BoardRiver Montessori Elementary Charter
3880 Cypress Drive Suite B, Petaluma, CA 94954-5613
Summary
Reading and math results average to the 79th percentile among comparable California schools.
67.9% of students met California's reading standard, but it is trending down slightly.
55.4% of students met California's math standard, but it is quickly trending up.
Proficiency stats
| Current Reading Proficiency | 67.9% |
| Current Math Proficiency | 55.4% |
| Reading State Rank | 812/4,657 (83rd percentile) |
| Math State Rank | 1,180/4,657 (75th percentile) |
School information
| Student / Teacher Ratio | 22:1 |
| Student enrollment (2024–25) | 144 |
| Low-Income Students | 35 (24.3%) |
| English Learners | 8 (5.6%) |
School Website
Great Schools
Niche
Ed-Data
CAASPP| Admissions | Lottery |
|---|---|
| Charter school | Yes |
| Magnet school | No |
Test score trends
Reading rose 6.8 points from last year and fell 2.0 points over the full period. Math fell 2.0 points from last year and rose 11.6 points over the full period.
•Math +11.6 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
The share meeting the reading standard ranges from 33.3% to 86.7% across the grades shown. Overall, the school’s reading results rank in the top 18% 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
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
Only one group has a reportable math result.
Distribution of Scores by Grade
The share meeting the math standard ranges from 40.0% to 68.8% across the grades shown. Overall, the school’s math results rank in the top 26% 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
Results for both language groups are unavailable, so a current math gap cannot be calculated.
Progress as students move up
2023–2026
How we compare income gaps
“Typical” means the median gap across 1,479 schools for reading and 1,483 for math. The comparison uses 2026 California K–6 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 River Montessori Elementary Charter compare within the district?
River Montessori Elementary Charter is No. 2 in both reading and math proficiency among the 6 K–6 schools in Old Adobe Union with 2026 results.
Explore the district’s schoolsHow does River Montessori Elementary Charter rank in California?
River Montessori Elementary Charter ranks No. 812 of 4,657 in reading and No. 1,180 of 4,657 in math for 2026. These proficiency rankings compare California schools in the same grade-level category.
How does River Montessori Elementary Charter compare with other schools in Petaluma?
River Montessori Elementary Charter is No. 4 in reading and No. 6 in math proficiency among the 15 K–6 schools in Petaluma with 2026 results.
Explore schools in PetalumaHow does River Montessori Elementary Charter compare with other schools in Sonoma County?
River Montessori Elementary Charter is No. 8 in reading and No. 10 in math proficiency among the 50 K–6 schools in Sonoma County with 2026 results.
Explore schools in Sonoma CountyWhich schools should I compare?
Schools serving K–6 in the same district.
| School | Math | Reading |
|---|---|---|
| River Montessori Elementary CharterThis school | 55.4% | 67.9% |
| La Tercera Elementary | 43.9% | 57.8% |
| Loma Vista Immersion Academy | 40.7% | 39.4% |
