Very Good
#191 of 1,790 private schools in CA
Top 11% of private schools
Charles Armstrong School
Middle School
1405 SOLANA DR, Belmont, CA 94002
Estimated academic score. This school does not have standardized test data. Based on CA statewide data. Learn more
Enrollment
224
Student-Teacher
5.1:1
Score
7.6
Grades
2nd – 8th
Enrollment
224
Student-Teacher
5.1:1
Score
7.6
Grades
2nd – 8th
Updated
2021-22
Updated 2021-22
How this school compares
In Belmont
#3 of 6
public schools
California middle schools
#4 of 45
About Charles Armstrong School
Charles Armstrong School serves 224 students in grades 2-8 in Belmont, California, earning an impressive 9.0 out of 10 rating from MySchoolScout and ranking #225 out of 1,790 California schools, placing it in the 88th percentile statewide. This public middle school stands out with an exceptionally low student-teacher ratio of 5.1:1, supported by 44 full-time equivalent teachers who can provide individualized attention to each student. The school operates as a regular public school in San Mateo County, offering a focused educational environment for students transitioning through their crucial middle school years.
With such a favorable student-to-teacher ratio, students benefit from small class sizes that foster personalized learning and strong teacher-student relationships. Charles Armstrong School is situated in Belmont's affluent 94002 ZIP code, where the median household income reaches $184,929 and median home values are $2,000,001. The surrounding community is highly educated, with 68% of residents holding bachelor's degrees or higher, and maintains a low poverty rate of 6.9%.
The school sits within this large suburban area that values education and provides a supportive environment for academic achievement, reflecting the community's commitment to quality education for its children.
What Parents Should Know
With a student-teacher ratio of 5.1:1, Charles Armstrong School offers a notably low ratio compared to the national average. This typically means smaller class sizes and more opportunities for one-on-one interaction between students and teachers.
As a private school, Charles Armstrong School operates independently from the local public school district. Families considering this school should inquire about tuition costs, financial aid availability, and the admissions process. Private schools are not required to follow the same curriculum standards as public schools, which can be either an advantage or a consideration depending on your priorities.
Financial Overview
Source: IRS Form 990 (2023 filing)
- Per-Pupil Spending
- Total expenses ÷ enrollment
- $66,562
- Per-Pupil Revenue
- Total revenue ÷ enrollment
- $65,416
- Financial Health
- Revenue-to-expense ratio (>1.0 = surplus)
- 0.98x — Tight
- Tuition Dependency
- Share of revenue from program services (tuition, fees)
- 87%
- Total Assets
- End-of-year total assets from IRS filing
- $29.7M
Financial data from IRS Form 990 filings via ProPublica Nonprofit Explorer. Per-pupil figures based on current enrollment of 224 students. Not all private schools file Form 990.
Compare to Public Schools
BetaHow Charles Armstrong School compares to 5 public schools serving similar grades in Belmont, CA
Student Demographics
Nearby Middle Schools
| School | Rating |
|---|---|
| Charles Armstrong School (this school) | 7.6 |
| Central Elementary | 8.0 |
| Nesbit Elementary | 4.6 |
| Cipriani Elementary | 8.0 |
| Ralston Intermediate | 8.4 |
| Fox Elementary | 7.3 |
Demographics sourced from NCES Private School Survey (PSS) and Common Core of Data (CCD). Comparisons are based on enrollment-weighted averages.
Score Breakdown
What This Rating Measures
This rating reflects classroom size, instructional time, student diversity, community resources, and school characteristics. Private schools are ranked against other private schools in CA.
Data Unavailable
View data sources
Score basis: Private school model
Data coverage: 80% of scoring components had data
Components scored: 4 of 5
Ranking pool: Private schools in CA
Test Scores
Test score data not yet available for this school.
Student Demographics NCES PSS (SY 2021-22)
Source: NCES Private School Survey (PSS)
Location
1405 SOLANA DR, Belmont, CA 94002
Nearby Alternatives
Families considering Charles Armstrong School may also want to explore other middle schools in the area. Tierra Linda Middle (rated 9.0/10, 0.2 miles away, in nearby San Carlos), which scores notably higher. Additionally, Central Middle (rated 8.2/10, 1.4 miles away, in nearby San Carlos), which scores slightly higher. For more schools in Belmont, see our Belmont schools guide .
Nearby Schools
20 within 1.4 mi| School | Distance | Rating |
|---|---|---|
| Charles Armstrong School Belmont | 0.0 mi | — |
| San Carlos Charter Learning Center San Carlos | 0.1 mi | 8.4 |
| Tierra Linda Middle San Carlos | 0.2 mi | 9.0 |
| Mariposa San Carlos | 0.2 mi | 9.4 |
| NOTRE DAME HIGH SCHOOL Belmont | 0.4 mi | 5.6 |
| Carlmont High Belmont | 0.4 mi | 9.1 |
| NOTRE DAME ELEMENTARY SCHOOL Belmont | 0.6 mi | 7.2 |
| Arundel Elementary San Carlos | 0.7 mi | 9.2 |
| IMMACULATE HEART OF MARY SCHOOL Belmont | 0.7 mi | 7.8 |
| Central Elementary Belmont | 0.9 mi | 8.0 |
| BELMONT OAKS ACADEMY Belmont | 0.8 mi | 6.6 |
| Belmont Oaks Academy Belmont | 0.8 mi | — |
| Nesbit Elementary Belmont | 1.1 mi | 4.6 |
| Heather Elementary San Carlos | 1.3 mi | 6.0 |
| ST CHARLES SCHOOL San Carlos | 1.3 mi | 5.2 |
| Serendipity School Belmont | 1.2 mi | — |
| SERENDIPITY SCHOOL Belmont | 1.2 mi | 8.3 |
| Cipriani Elementary Belmont | 1.3 mi | 8.0 |
| Brittan Acres Elementary San Carlos | 1.4 mi | 9.2 |
| Central Middle San Carlos | 1.4 mi | 8.2 |
Neighborhood Census ACS (2019-2023)
Census data for ZIP 94002 (ACS 2019-2023 5-Year Estimates) · Data sources
Median Income
$204,573
Median Home Value
$2,000,001
Median Rent
$2,889/mo
Population
27,730
College Educated
68.6%
Homeownership
56.2%
Avg Commute
29.4 min
Poverty Rate
6.6%
Median Age
40.4
Community Profile
The community surrounding Charles Armstrong School has a median household income of $204,573. It is a well-educated community where 69% of adults hold a bachelor's degree or higher. The median home value in the area is $2,000,001, with a median rent of $2,889/month. The local poverty rate of 6.6% is relatively low. The average commute for residents is 29 minutes. Source: U.S. Census ACS 2022 5-Year Estimates.
Similar Schools
Schools in the same state with comparable level, size, and ratings
| School | Rating |
|---|---|
| Sunset Bakersfield, CA | 7.6 |
| Walton Middle Compton, CA | 7.6 |
| College Connection Academy San Jose, CA | 7.5 |
| Fine Arts Academy Atascadero, CA | 7.5 |
| Fort Irwin Middle Yermo, CA | 7.5 |
| ICEF View Park Preparatory Middle Los Angeles, CA | 7.5 |
Frequently Asked Questions
Common questions about Charles Armstrong School
What grades does Charles Armstrong School serve?
Charles Armstrong School serves students in grades 2nd through 8th.
How many students attend Charles Armstrong School?
Charles Armstrong School has an enrollment of approximately 224 students.
What is the student-teacher ratio at Charles Armstrong School?
The student-teacher ratio at Charles Armstrong School is 5.1:1. A lower ratio generally means more individual attention per student. The national average is approximately 11:1 for private schools.
How does Charles Armstrong School rank in CA?
Charles Armstrong School is ranked #191 out of 1,790 private schools in CA.
What is Charles Armstrong School's MySchoolScout rating?
Charles Armstrong School has a composite rating of 7.6 out of 10 on MySchoolScout. This score combines academic performance, student growth, and school environment into a single score. Equity data is shown separately for context.
Is Charles Armstrong School a private school?
Yes, Charles Armstrong School is a private coeducational school with a Nonsectarian affiliation. Private schools are not required to participate in state standardized testing, so academic performance data may be limited compared to public schools.
Is Charles Armstrong School a religious school?
No, Charles Armstrong School is a nonsectarian (non-religious) private school.
Explore More Schools
Neighborhood Context
Quick Facts NCES PSS (SY 2021-22)
- Grades
- 2nd – 8th
- Enrollment
- 224
- Gender Split
- 53% M / 47% F
- Student-Teacher Ratio
- 5.1:1
- Teachers (FTE)
- 44
- Type
- private
- Coed Status
- coed
- Affiliation
- Nonsectarian
- School Day
- 7 hours
- Days Per Year
- 166 days
- Setting
- Large Suburb
- County
- SAN MATEO
- Phone
- (650) 592-7570
- Data Year
- 2022–2023
Resources & Links
How We Rate Schools
Every school receives a composite score from 1 to 10 based on four pillars: Academic Performance (50%), Student Growth (20%), Equity (15%), and Learning Environment (15%). Scores are built from publicly available data including standardized test results, enrollment figures, and school climate indicators.
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