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SCHOOL COMMUNITY·STATE CHARTER SCHOOL INSTITUTE·NCES 080002001913

Ross Montessori School

109 LEWIES LANE, CARBONDALE, CO 81623 · (970) 963-7199 · Garfield County
GRADES PK–08ELEMENTARY33-TOWNCHARTERREGULAR SCHOOL183 STUDENTS
Enrollment
183
Elementary
DISTRICT 291 · STATE 379
Student : Teacher
19.2:1
10 FTE teachers
DISTRICT 15.0:1 · STATE 16.6:1
Free / Reduced Lunch
38%
70 students
DISTRICT 53% · STATE 50%
Community
0
0 members
Enrollment and student:teacher ratio compared against other elementary schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade
Pre-K
6
Kindergarten
15
Grade 1
16
Grade 2
18
Grade 3
25
Grade 4
26
Grade 5
22
Grade 6
26
Grade 7
14
Grade 8
15
Student demographics
White
10055%
DISTRICT 47% · STATE 49%
Hispanic
7139%
DISTRICT 40% · STATE 37%
Black
42%
DISTRICT 4% · STATE 5%
Asian
21%
DISTRICT 3% · STATE 3%
Two+
53%
DISTRICT 5% · STATE 5%
Native American
11%
DISTRICT 1% · STATE 1%
Student head counts by race/ethnicity from federal NCES enrollment data. Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
Male
8546%
Female
9854%

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Test scores

CMAS 2024-25 . % Met or Exceeded Expectations
English Language Arts
44.3%
CO avg 44.9% . +0.3pp since 2023
Math
30.7%
CO avg 36.1% . +8.3pp since 2023
Source: CMAS. All students, all grades. See all years and grades →

BeatsExpectations

Demographically-adjusted score · methodology
Tier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
35.4%
composite math + reading, all grades
Predicted
43.5%
based on CO schools with similar FRL share
Beats by
-8.2pp
below demographic expectation
BeatsExpectations runs a per-state regression of proficiency on free/reduced-lunch share, then scores each school by residual. How this is calculated →

7-year change

SY 2017-18 vs SY 2024-25
Enrollment
183
-120 (-40%) vs 2017
Student : Teacher
19.2:1
was 20.4:1
% White
55%
was 71%
% Hispanic
39%
was 25%
Source: NCES Common Core of Data

About Ross Montessori School

Located at 109 LEWIES LANE, in CARBONDALE, Colorado, Ross Montessori School is a close-knit primary school that educates 183 students (grades pre-K through 8), part of State Charter School Institute. Compared to the state average of about 379 students per school, that is 52% smaller than typical.

Across the 49 schools in State Charter School Institute (21,411 students total), Ross Montessori School accounts for its share of the district's footprint.

Looking at the student body, Ross Montessori School shows that the largest single group is White at 55%, but no single group is in the majority. The remainder consists of 39% Hispanic, 3% multiracial, 2% Black. The wider county runs roughly 69% White, putting the school's mix considerably less White than the area baseline.

On the resource side, Ross Montessori School records 10 full-time-equivalent teachers, putting the student-to-teacher ratio at about 19.2:1. The state averages around 16.6:1, so this campus is higher than the state norm typical. About 38% of enrolled students meet the income threshold for free or reduced-price lunch, often used as a Title I proxy. Set against Garfield County (around 50%), the school's rate is noticeably below typical.

Adjusting for the school's free-and-reduced-lunch share, Ross Montessori School sits in the middle band of the BeatsExpectations distribution. Schools with this campus's student mix typically land near 43.5%; this one delivers 35.4%.

Zooming out to the county, census data for Garfield County shows median household income runs about $91,131, 34% of adults hold a bachelor's degree or higher, and roughly 5% of residents live below the federal poverty line. Ross Montessori School is one of 29 public schools in Garfield County (combined enrollment of about 10,790 students).

Bridges is the nearest neighboring public school, about 0.1 miles from this campus. Within five miles, there are 5 other public schools. Among the 7 schools in that immediate cluster with test data (this one included), Ross Montessori School ranks 4th on composite proficiency, higher than the local average of 35.1%.

Ross Montessori School operates from a town-based location. Ross Montessori School operates as a public charter school, meaning it is publicly funded but governed independently of the surrounding district's traditional schools.

Looking at the recent track record. Looking back 7 years, enrollment at Ross Montessori School has decreased 40%, going from 303 students in 2018 to 183 in 2025. Over the same period, the White share ticked down from 71% to 55%. The student-to-teacher ratio narrowed from 20.4:1 in 2018 to 19.2:1 today.

On this page, the feed for Ross Montessori School typically covers school events, parent volunteer needs, and clubs. Members of the school community can share what they know.

Garfield County at a glance

View full county profile
Population
62,479
Census ACS
Median income
$91,131
Household, ACS
Bachelor's+
34%
Adults 25+
Poverty rate
5%
Below federal line
Schools in county
29
10,790 students

Quick facts

School name
Ross Montessori School
District
State Charter School Institute
Address
109 LEWIES LANE, CARBONDALE, CO 81623
Phone
(970) 963-7199
County
Garfield County
Level
Elementary
Grade range
PK–08
Total enrollment
183
Teachers (FTE)
10
Student–teacher ratio
19.2:1
Free/Reduced lunch
70 (38%)
Locale
33-Town: Remote
NCES ID
080002001913
Charter school
Yes
Virtual school
No

Related schools

Other schools in State Charter School Institute
Other schools in CARBONDALE
Nearby schools

Frequently asked questions

About Ross Montessori School
How large is Ross Montessori School?
Ross Montessori School enrolls approximately 183 students in grades PK-08.
What age range does Ross Montessori School serve?
Ross Montessori School serves students from grade PK through grade 08.
How many teachers does Ross Montessori School have?
Ross Montessori School employs 10 FTE teachers, for a student-to-teacher ratio of 19.2:1.
What is the student diversity at Ross Montessori School?
Student demographics at Ross Montessori School are roughly 55% White, 39% Hispanic, 2% Black, 1% Asian, 3% Two or more.
Who oversees Ross Montessori School?
Ross Montessori School is overseen by State Charter School Institute in Garfield County.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.
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