How does Ruth Musser Middle compare to other middle schools in Rancho Cucamonga?

Ruth Musser Middle has a SchoolScope composite score of 47.6/100, placing it at the 66th percentile statewide. 20% of students exceed standard, with a total of 1,565 students tested across grades and subjects.

What percentage of students exceed standards at Ruth Musser Middle?

20.0% of students at Ruth Musser Middle exceed the state standard on CAASPP assessments, while 43.2% meet or exceed it. The gap between these two numbers reveals whether the school pushes students beyond basic proficiency.

Is Ruth Musser Middle improving or declining?

Based on CAASPP data, Ruth Musser Middle's proficiency rate increases by 8.4 percentage points from Grade 6 to grade 8 growth. This suggests the school may be adding value over time.

What is the chronic absenteeism rate at Ruth Musser Middle?

20.4% of students at Ruth Musser Middle are chronically absent (missing 10% or more of school days). This metric reflects school culture and family engagement, and is weighted at 15% in our composite score.

Ruth Musser Middle

Middle School

Central Elementary Rancho CucamongaSan Bernardino County91730

📍 10789 Terra Vista Parkway

Composite Score

out of 100

State Percentile

of middle schools

State Rank

of 1,714 California middle schools

📈

On the Rise

On an upward trajectory — scores are improving faster than average. Worth a closer look.

Composite scores are SchoolScope's analysis of public data from the California Dept. of Education (CAASPP, chronic absenteeism, suspension rates). They are not official CDE ratings and should not be the sole basis for school decisions. See methodology.

School overview

Enrollment

945 students

Student-Teacher Ratio

25:1

Free/Reduced Lunch

68%

Teachers

38 full-time

Dashboard indicators

ELA Year-over-Year

Maintained

+2.9 pts DFS change

Math Year-over-Year

Maintained

+0.5 pts DFS change

EL Proficiency (ELPAC)

23.7%

English learners at Level 4 (Well Developed) · 59 tested

Data source: California School Dashboard 2025, ELPAC 2024

Student demographics

Hispanic47.6%

White16.0%

Asian9.9%

Black15.9%

Other10.6%

Performance breakdown

Performance breakdown for Ruth Musser Middle
Category	Percentage
Exceeded Standard	20.0%
Met Standard	23.2%
Below Standard	56.8%

What other rankings don't show you

Most rating sites report "43% proficient" for Ruth Musser Middle and stop there. Here's what that number hides:

20.0% of students exceeded standard while 23.2% met it. That exceeded rate is 2.7 points above the state average of 17.3%. That's 3.4 points above the Central Elementary district average of 16.6%. The 5 nearby schools within ~3 miles average 26.4% exceeded — 6.4 points higher. The gap between "met" and "exceeded" can reveal how much a school's curriculum challenges students beyond proficiency.

Students here improve by 8.4 percentage points from Grade 6 to grade 8 growth, suggesting the school is adding value beyond what students arrive with.

California's Dashboard shows ELA performance maintained and Math maintained year-over-year. 23.7% of English learners reached Level 4 (Well Developed) on ELPAC.

Chronic absenteeism is 20.4%, above the state average of 19.3%.

Why the exceeded vs. met split matters →

Key metrics

% Exceeded Standard

20.0%

Students scoring above proficient

% Met or Above

43.2%

Students meeting standard

Growth (G6→G8)

+8.4pp

Change in proficiency rate

Chronic Absenteeism

20.4%

Students missing 10%+ of days

Suspension Rate

2.7%

Students suspended at least once

Total Tested

1,565

Across all grades & subjects

Grade trajectory

ELA Trajectory

G6 → G7 → G8

Math Trajectory

G6 → G7 → G8

ELA scores by grade

Grade	Tested	Exceeded	Met	Nearly Met	Not Met	Met+Above
5th	140	27.1%	24.3%	20.7%	27.9%	51.4%
6th	266	24.1%	26.3%	27.4%	22.2%	50.4%
7th	248	18.1%	33.1%	23.8%	25.0%	51.2%
8th	267	26.6%	36.0%	21.7%	15.7%	62.5%

Math scores by grade

Grade	Tested	Exceeded	Met	Nearly Met	Not Met	Met+Above
5th	142	15.5%	10.6%	31.7%	42.3%	26.1%
6th	267	16.5%	14.6%	29.2%	39.7%	31.1%
7th	249	14.5%	13.7%	29.7%	42.2%	28.1%
8th	268	20.1%	15.7%	27.2%	36.9%	35.8%

K-12 Feeder PathBoundary data

Elementary

Dona Merced Elementary

47.159th pctile

Coyote Canyon Elementary

No score

▼

Middle

Ruth Musser Middle

47.666th pctile

This school

▼

High School

No feeder data available for this level

Feeder patterns derived from 2015-16 NCES attendance boundary data. Boundaries may have changed. Contact your school district for current information.