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Very Good

#110 of 389 private schools in MA

Top 28% of private schools

Keystone Montessori School

Elementary School

55 MIDDLESEX ST, North Chelmsford, MA 01863

Private Estimated Score

Estimated academic score. This school does not have standardized test data. Based on MA statewide data. Learn more

Enrollment

50

Student-Teacher

4.5:1

Score

7.1

Grades

Kindergarten – 6th

Updated 2021-22

How this school compares

In North Chelmsford

#1 of 2

public schools

Massachusetts elementary schools

#33 of 200

About Keystone Montessori School

Keystone Montessori School is a charming elementary school nestled in the heart of North Chelmsford, Massachusetts. Serving students from kindergarten through sixth grade, the school houses an intimate community of 50 students with a student-teacher ratio of 4.5:1, allowing for personalized attention and support. With 11 full-time equivalent teachers dedicated to fostering learning, Keystone Montessori School offers a nurturing environment that emphasizes hands-on education and individualized instruction.

While the school's MySchoolScout rating suggests room for academic growth, it is important to note that Keystone Montessori places a strong emphasis on student development and holistic learning. The school's setting in a large suburban area provides students with a variety of educational opportunities beyond the classroom, such as field trips and community involvement. Keystone Montessori School thrives within its supportive neighborhood, offering families a close-knit and caring academic environment for their children to grow and flourish.

What Parents Should Know

With an enrollment of 50 students, Keystone 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 4.5:1, Keystone 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, Keystone 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 Keystone Montessori School compares to the 2 public schools in North Chelmsford, MA

Student-Teacher Ratio
4.5:1
This School
vs
13.7:1
Public Avg
Avg School Size
50
This School
vs
945
Public Avg
Avg School Scout Rating
7.1
This School
vs
6.4
Public Avg

Student Demographics

Asian 50% vs 0%
Black 20% vs 0%
White 10% vs 0%
Hispanic 10% vs 0%
Keystone Montessori School North Chelmsford Public Avg

All Schools in North Chelmsford

School Rating
Keystone Montessori School (this school) 7.1
Charles D Harrington 5.6
Chelmsford High 7.1

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 MA.

Classroom Attention
? Student-teacher ratio calibrated against other private schools. Lower ratios mean more individual attention. (30% of overall score)
A 9.3 / 10
View breakdown
Student-Teacher Ratio 4.5:1
Instructional Commitment
? Total annual instructional hours based on school day length and days per year. (15% of overall score)
C+ 3.8 / 10
View breakdown
School Day Length 6.5 hours
Annual Instructional Hours 1,111.5
Diversity & Inclusion
? Racial and ethnic diversity of the student body using Simpson's diversity index. (20% of overall score)
A 9.4 / 10
View breakdown
Diversity Index 68%
Community Context

Data Unavailable

School Profile
? Enrollment size and grade span breadth — indicators of program depth and peer community. (15% of overall score)
C 3.1 / 10
View breakdown
Enrollment 50
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 MA

Test Scores

Test score data not yet available for this school.

Student Demographics NCES PSS (SY 2021-22)

Asian 50.0%
Black 20.0%
White 10.0%
Hispanic 10.0%
Two or More 10.0%

Source: NCES Private School Survey (PSS)

Location

55 MIDDLESEX ST, North Chelmsford, MA 01863

Nearby Alternatives

Families considering Keystone Montessori School may also want to explore other elementary schools in the area. Dr Gertrude Bailey (rated 6.9/10, 2.4 miles away, in nearby Lowell), with a very similar rating. Another option is Bartlett Community Partnership (rated 6.8/10, 2.6 miles away, in nearby Lowell), with a very similar rating. Additionally, Joseph McAvinnue (rated 6.0/10, 2.4 miles away, in nearby Lowell), a more accessible option. For more schools in North Chelmsford, see our North Chelmsford schools guide .

Nearby Schools

20 within 3.1 mi
School Distance Rating
LIGHTHOUSE SCHOOL, INC North Chelmsford 0.6 mi 7.1
Charles D Harrington North Chelmsford 1.0 mi 5.6
Chelmsford High North Chelmsford 1.1 mi 7.1
Gr Lowell Regional Vocational Technical Tyngsborough 1.2 mi 6.5
Col Moses Parker School Chelmsford 1.3 mi 5.6
Collegiate Charter School of Lowell Lowell 1.0 mi 2.9
McCarthy Middle School Chelmsford 1.4 mi 5.8
GREATER VISIONS CHILDRENS CENTER Chelmsford 1.8 mi
Pawtucketville Memorial Lowell 1.6 mi 4.5
Dr An Wang School Lowell 1.7 mi 4.2
Innovation Academy Charter School Tyngsboro 2.1 mi 5.5
COMMUNITY CHRISTIAN ACADEMY Lowell 2.2 mi 5.4
James S Daley Middle School Lowell 2.3 mi 7.1
Community Education Center Chelmsford 2.6 mi 5.0
Dr Gertrude Bailey Lowell 2.4 mi 6.9
Joseph McAvinnue Lowell 2.4 mi 6.0
Charles W Morey Lowell 2.4 mi 4.7
Bartlett Community Partnership Lowell 2.6 mi 6.8
Center Elementary School Chelmsford 3.1 mi 6.0
Brookside Elementary Dracut 3.1 mi 3.4

Neighborhood Census ACS (2019-2023)

Census data for ZIP 01863 (ACS 2019-2023 5-Year Estimates) · Data sources

Median Income

$136,284

Median Home Value

$477,900

Median Rent

$1,698/mo

Population

9,592

College Educated

48.6%

Homeownership

84.4%

Avg Commute

29 min

Poverty Rate

3.4%

Median Age

42.8

Community Profile

The community surrounding Keystone Montessori School has a median household income of $136,284. It is a well-educated community where 49% of adults hold a bachelor's degree or higher. The median home value in the area is $477,900, with a median rent of $1,698/month. The local poverty rate of 3.4% 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
New Marlborough Central Sheffield, MA 7.1
Hawlemont Regional Charlemont, MA 7.0
SUMMIT MONTESSORI SCHOOL Framingham, MA 7.0
PIONEER VALLEY MONTESSORI SCHOOL Springfield, MA 7.3
VINEYARD MONTESSORI SCHOOL Vineyard Haven, MA 6.8
Emma L Miller Elementary School Savoy, MA 7.5

Frequently Asked Questions

Common questions about Keystone Montessori School

What grades does Keystone Montessori School serve?

Keystone Montessori School serves students in grades Kindergarten through 6th.

How many students attend Keystone Montessori School?

Keystone Montessori School has an enrollment of approximately 50 students.

What is the student-teacher ratio at Keystone Montessori School?

The student-teacher ratio at Keystone Montessori School is 4.5:1. A lower ratio generally means more individual attention per student. The national average is approximately 11:1 for private schools.

How does Keystone Montessori School rank in MA?

Keystone Montessori School is ranked #110 out of 389 private schools in MA.

What is Keystone Montessori School's MySchoolScout rating?

Keystone Montessori School has a composite rating of 7.1 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 Keystone Montessori School a private school?

Yes, Keystone Montessori 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 Keystone Montessori School a religious school?

No, Keystone Montessori School is a nonsectarian (non-religious) private school.

11 schools nearby View map →

Neighborhood Context

Walk Score
64 Somewhat Walkable
Bike Score
34 Somewhat Bikeable

Powered by Walk Score

FBI UCR. County-level only.

Quick Facts NCES PSS (SY 2021-22)

Grades
Kindergarten – 6th
Enrollment
50
Gender Split
70% M / 30% F
Student-Teacher Ratio
4.5:1
Teachers (FTE)
11
Type
private
Coed Status
coed
Affiliation
Nonsectarian
School Day
6.5 hours
Days Per Year
171 days
Setting
Large Suburb
County
MIDDLESEX
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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