Ruth Musser Middle
10789 Terra Vista Parkway, Rancho Cucamonga, CA 91730-7324
Summary
Ruth Musser Middle is underperforming.
Reading and math results average to the 63rd percentile among comparable California schools.
53.7% of students met California's reading standard, and it is holding steady.
Math is weaker: 32.1% of students met California's math standard, but it is trending up slightly.
Proficiency stats
| Current Reading Proficiency | 53.7% |
| Current Math Proficiency | 32.1% |
| Reading State Rank | 486/1,734 (72nd percentile) |
| Math State Rank | 807/1,735 (54th percentile) |
School information
| Student / Teacher Ratio | 22:1 |
| Student enrollment (2024–25) | 941 |
| Low-Income Students | 647 (68.8%) |
| English Learners | 80 (8.5%) |
School Website
Great Schools
Niche
Ed-Data
CAASPP| Admissions | Open enrollment |
|---|---|
| Charter school | No |
| Magnet school | No |
Test score trends
Reading fell 0.6 points from last year and was unchanged over the full period. Math rose 1.2 points from last year and rose 1.1 points over the full period.
Reading Proficiency Scores
2026 state test results
Race and Ethnicity
Filipino and White students have the strongest results.
Distribution of Scores by Grade
The share meeting the reading standard ranges from 49.4% to 63.0% across the grades shown. Overall, the school’s reading results rank in the top 29% among California schools in the same grade-level category.
Low-Income vs Non-Low-Income
The 23.1-point reading income gap is wider than the 16.3-point gap at a typical California 5–8 school. It widened slightly over the period shown.
•English Learners vs English Native
13.0% of English learners meet the reading standard, compared with 51.8% of English-only students. The gap widened as English-learner results fell and English-only results fell.
•Math Proficiency Scores
2026 state test results
Race and Ethnicity
Filipino students have the strongest math results at about 67% proficiency. The other reported groups range from about 14% to 55%.
Distribution of Scores by Grade
The share meeting the math standard ranges from 28.8% to 36.9% across the grades shown. Overall, the school’s math results rank in the top 47% among California schools in the same grade-level category.
Low-Income vs Non-Low-Income
The 22.1-point math income gap is wider than the 15.3-point gap at a typical California 5–8 school. It widened over the period shown.
•English Learners vs English Native
6.0% of English learners meet the math standard, compared with 28.1% of English-only students. The gap widened as English-learner results fell and English-only results rose.
•Progress as students move up
2023–2026
How we compare income gaps
“Typical” means the median gap across 59 schools for reading and 60 for math. The comparison uses 2026 California 5–8 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 Ruth Musser Middle rank in California?
Ruth Musser Middle ranks No. 486 of 1,734 in reading and No. 807 of 1,735 in math for 2026. These proficiency rankings compare California schools in the same grade-level category.
How does Ruth Musser Middle compare with other schools in San Bernardino County?
Ruth Musser Middle is No. 1 in both reading and math proficiency among the 3 5–8 schools in San Bernardino County with 2026 results.
Explore schools in San Bernardino County