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Very Good

#249 of 1,790 private schools in CA

Top 14% of private schools

St Mary's Montessori School

Elementary School

6860 N VICTORIA WINDROWS LOOP, Rancho Cucamonga, CA 91739

Private Estimated Score

Estimated academic score. This school does not have standardized test data. Based on 14 schools in Rancho Cucamonga. Learn more

Enrollment

51

Student-Teacher

8.5:1

Score

7.5

Grades

Kindergarten – 5th

Updated 2021-22

How this school compares

In Rancho Cucamonga

#1 of 6

public schools

California elementary schools

#130 of 1,102

About St Mary's Montessori School

ST MARY'S MONTESSORI SCHOOL serves 51 students from kindergarten through fifth grade in Rancho Cucamonga, offering an intimate learning environment with just 6 full-time teachers. This small elementary school maintains an exceptional student-teacher ratio of 8.5:1, allowing for personalized attention and close relationships between educators and students. The school has earned recognition for its academic excellence, receiving a 9.0 out of 10 rating from MySchoolScout and ranking #544 out of 1790 elementary schools statewide, placing it in the 70th percentile among California schools.

This strong performance reflects the school's commitment to providing quality education within its specialized Montessori framework. Despite being classified as a regular public school, ST MARY'S MONTESSORI SCHOOL incorporates the distinctive Montessori educational approach, which emphasizes hands-on learning, student choice, and mixed-age classrooms. The small enrollment creates a close-knit school community where students can develop strong connections with peers and teachers.

The school is situated in an affluent area of Rancho Cucamonga where families value education highly, with 44% of residents holding bachelor's degrees or higher. The surrounding neighborhood features a median household income of $138,079 and maintains a low poverty rate of 4.8%, creating a stable and supportive environment for learning in this large suburban community.

What Parents Should Know

With an enrollment of 51 students, St Mary's Montessori School is a smaller school where families often find a close-knit community atmosphere. Smaller settings can mean more individual attention from teachers and staff, though they may offer fewer extracurricular options than larger schools.

With a student-teacher ratio of 8.5:1, St Mary's Montessori 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, St Mary's Montessori 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.

Compare to Public Schools

Beta

How St Mary's Montessori School compares to 10 public schools serving similar grades in Rancho Cucamonga, CA

Student-Teacher Ratio
8.5:1
This School
vs
23.6:1
Public Avg
Avg School Size
51
This School
vs
611
Public Avg
Avg School Scout Rating
7.5
This School
vs
5.1
Public Avg

Student Demographics

Asian 39.2% vs 0%
Hispanic 31.4% vs 0%
White 27.5% vs 0%
Black 2% vs 0%
St Mary's Montessori School Rancho Cucamonga Public Avg

Nearby Elementary Schools

School Rating
St Mary's Montessori School (this school) 7.5
Terra Vista Elementary 5.2
Coyote Canyon Elementary 5.2
Ruth Musser Middle 5.4
Dona Merced Elementary 4.9
Central Elementary 5.9
Cucamonga Elementary 4.8
Ontario Center 3.8
Bear Gulch Elementary 3.8
Valle Vista Elementary 7.2
Los Amigos Elementary 4.7

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.

Classroom Attention
? Student-teacher ratio calibrated against other private schools. Lower ratios mean more individual attention. (30% of overall score)
A- 7.7 / 10
View breakdown
Student-Teacher Ratio 8.5:1
Instructional Commitment
? Total annual instructional hours based on school day length and days per year. (15% of overall score)
A+ 9.6 / 10
View breakdown
School Day Length 7.5 hours
Annual Instructional Hours 1,432.5
Diversity & Inclusion
? Racial and ethnic diversity of the student body using Simpson's diversity index. (20% of overall score)
A- 8.4 / 10
View breakdown
Diversity Index 67%
Community Context

Data Unavailable

School Profile
? Enrollment size and grade span breadth — indicators of program depth and peer community. (15% of overall score)
C+ 3.6 / 10
View breakdown
Enrollment 51
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)

Asian 39.2%
Hispanic 31.4%
White 27.5%
Black 2.0%

Source: NCES Private School Survey (PSS)

Location

6860 N VICTORIA WINDROWS LOOP, Rancho Cucamonga, CA 91739

Nearby Alternatives

Families considering St Mary's Montessori School may also want to explore other elementary schools in the area. John L. Golden Elementary (rated 8.0/10, 1.1 miles away, in nearby Etiwanda), which scores slightly higher. Another option is Etiwanda Colony Elementary (rated 7.4/10, 1.2 miles away, in nearby Etiwanda), with a very similar rating. Additionally, Carleton P. Lightfoot Elementary (rated 6.9/10, 1.2 miles away, in nearby Alta Loma), with a comparable rating. For more schools in Rancho Cucamonga, see our Rancho Cucamonga schools guide .

Nearby Schools

20 within 2.1 mi
School Distance Rating
Windrows Elementary Etiwanda 0.2 mi 5.6
Etiwanda Intermediate Etiwanda 0.4 mi 6.2
Grapeland Elementary Etiwanda 0.5 mi 5.8
John L. Golden Elementary Etiwanda 1.1 mi 8.0
Rancho Cucamonga High Rancho Cucamonga 1.0 mi 6.2
Perdew Elementary Etiwanda 1.2 mi 4.3
Etiwanda High Etiwanda 1.1 mi 7.1
Etiwanda Colony Elementary Etiwanda 1.2 mi 7.4
Carleton P. Lightfoot Elementary Alta Loma 1.2 mi 6.9
SACRED HEART PARISH SCHOOL Rancho Cucamonga 1.5 mi 5.8
Summit Intermediate Etiwanda 1.4 mi 7.1
Etiwanda Community Day Etiwanda 1.4 mi
Terra Vista Elementary Rancho Cucamonga 1.5 mi 5.2
Caryn Elementary Alta Loma 1.5 mi 6.1
Day Creek Intermediate Etiwanda 1.8 mi 7.6
ST MARYS MONTESSORI SCHOOL-FONTANA Fontana 1.5 mi
West Heritage Elementary Fontana 1.7 mi 6.8
Heritage Intermediate Fontana 1.8 mi 6.4
Los Osos High Rancho Cucamonga 1.9 mi 7.3
MONTESSORI CHILD DEVELOPMENT CENTER Fontana 2.1 mi

Neighborhood Census ACS (2019-2023)

Census data for ZIP 91739 (ACS 2019-2023 5-Year Estimates) · Data sources

Median Income

$141,475

Median Home Value

$860,200

Median Rent

$2,508/mo

Population

41,722

College Educated

44.9%

Homeownership

73.2%

Avg Commute

33.3 min

Poverty Rate

6.1%

Median Age

37.2

Community Profile

The community surrounding St Mary's Montessori School has a median household income of $141,475. It is a well-educated community where 45% of adults hold a bachelor's degree or higher. The median home value in the area is $860,200, with a median rent of $2,508/month. The local poverty rate of 6.1% is relatively low. The average commute for residents is 33 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
GUIDEPOST AT LAS FLORES Laguna Hills, CA 7.5
L.A. COUNTY FAIR ASSOC. CHILD DEVELOPMENT CENTER Pomona, CA 7.5
MONTESSORI SCHOOL OF PALM SPRINGS Palm Springs, CA 7.5
Oak Run Elementary Oak Run, CA 7.5
Berry Creek Elementary Bangor, CA 7.6
CENTENNIAL MONTESSORI SCHOOL San Mateo, CA 7.4

Frequently Asked Questions

Common questions about St Mary's Montessori School

What grades does St Mary's Montessori School serve?

St Mary's Montessori School serves students in grades Kindergarten through 5th.

How many students attend St Mary's Montessori School?

St Mary's Montessori School has an enrollment of approximately 51 students.

What is the student-teacher ratio at St Mary's Montessori School?

The student-teacher ratio at St Mary's Montessori School is 8.5:1. A lower ratio generally means more individual attention per student. The national average is approximately 11:1 for private schools.

How does St Mary's Montessori School rank in CA?

St Mary's Montessori School is ranked #249 out of 1,790 private schools in CA.

What is St Mary's Montessori School's MySchoolScout rating?

St Mary's Montessori School has a composite rating of 7.5 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 St Mary's Montessori School a private school?

Yes, St Mary's Montessori School is a private coeducational school with a Roman Catholic affiliation. Private schools are not required to participate in state standardized testing, so academic performance data may be limited compared to public schools.

Is St Mary's Montessori School a religious school?

St Mary's Montessori School has a Roman Catholic religious affiliation.

11 schools nearby View map →

Neighborhood Context

Walk Score
34 Car-Dependent
Transit Score
0 Minimal Transit
Bike Score
52 Bikeable
City Safety
High (2,116/100K)

Powered by Walk Score

FBI UCR 2024. City-level (Rancho Cucamonga). Data >1 year old.

Quick Facts NCES PSS (SY 2021-22)

Grades
Kindergarten – 5th
Enrollment
51
Gender Split
55% M / 45% F
Student-Teacher Ratio
8.5:1
Teachers (FTE)
6
Type
private
Coed Status
coed
Affiliation
Roman Catholic
School Day
7.5 hours
Days Per Year
191 days
Setting
Large Suburb
County
SAN BERNARDINO
Data Year
2022–2023

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.

Read our full methodology

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