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Charter elementary school · Mountain School Inc. (4203) · Flagstaff, Arizona

Mountain School

Mountain School rates 5.9, right at the middle of Mountain School Inc. (4203)'s elementary schools, whose rated median is 5.9.

Elementary schools, 1 to 10This campus against public elementary schools around it that are rated on verified state test data.
5.9this school

5.9 on a one-to-ten scale; the Mountain School Inc. (4203) median is 5.9.

#1,213 of 2,019 schools in Arizona · Mountain School Inc. (4203): 1 elementary schools rated, median 5.9

The brief

A charter elementary school in Flagstaff, AZ where students score 61 points above what's typical for similar communities.

It ranks 1,213 of 2,019 schools in Arizona and 1 of 1 in Mountain School Inc. (4203).

Mountain School is a charter school: it enrolls by application rather than by address, so check its enrollment process directly before choosing a neighborhood for it.

Math55%17 points above the Arizona average of 38%2025 AASA
Reading68%28 points above the Arizona average of 40%2025 AASA
Proficiency has held near 61% across the 2-year record (2024–2025).2025 AASA; 44 test records from AZ state assessments and EdFacts (NCES).

What the rating is made of, each out of 10

Student Progress
3.4
50% of the rating
Academics
9.2
30% of the rating
Resources & Environment
7.2
20% of the rating
About this school's data1 correction under review · rating: low confidence · 6 sources, 2019–2025

Every number on this page comes from a published source with a stated period. Where a source is partial, aging, an estimate, or describes a surrounding area rather than the school, that limitation is named here.

Attendance data is under correction. This existing Resources & Environment score and overall rating may still reflect an unverified attendance input.

Full Profile · 3/3 metrics

Multi-year averages used by the rating model: math 60% (multi-year average, 2009-2025) · reading/ELA 74% (multi-year average, 2009-2025).

School directory (enrollment, grades, staff, contact)
NCES Common Core of Data (CCD) · SY 2023–24 · Medium confidence
  • Source period: SY 2023–24. A newer release may be available.
MySchoolScout rating and rank
MySchoolScout ranking model · Low confidence
  • Vintage not available. Do not use this measure alone.
  • Derived as a weighted blend of the component scores shown in Academics from state assessment, EdFacts growth, and NCES resource records.
Math proficiency
State department of education · 2025 AASA · Medium confidence
  • Available for part of the eligible units; results may not represent the full area.
  • Derived from source records rather than read directly from one field.
Reading/ELA proficiency
State department of education · 2025 AASA · Medium confidence
  • Available for part of the eligible units; results may not represent the full area.
  • Derived from source records rather than read directly from one field.
Student progress (growth)
State assessments · Mixed source periods · Low confidence
  • Vintage not available. Do not use this measure alone.
  • Available for part of the eligible units; results may not represent the full area.
  • Derived as the fitted year-over-year slope of proficiency from multi-year assessment records.
Neighborhood (income, housing, education)
U.S. Census ACS 5-year estimates · ACS 2019–2023 5-year estimates · Low confidence
  • Older source: ACS 2019–2023 5-year estimates. Use as historical context.
  • Reported for the ZCTA for ZIP 86005; this does not measure the attendance area.

Evidence periods: Rating mixed/unknown input periods; assessments multi-year average, 2009-2025; directory SY 2023–24

The neighborhood

Where it sits, and what the area looks like.
Mountain School and the 20 nearest elementary schools, each pin colored by its score.Pins are locations, not attendance boundaries. Verify the enrollment path with the district.

The area

Median income
$81,250
Median home value
$556,400
Median rent
$1,531/mo
College educated
58.6%
Homeownership
57.7%
Poverty rate
10.9%

U.S. Census ACS 5-year estimates · ACS 2019–2023 5-year estimates for the ZCTA associated with school ZIP 86005; this is area context, not an attendance boundary.

Getting around

Walk Score
19
Car-Dependent
Transit Score
41
Some Transit
Bike Score
64
Bikeable

Walk, transit and bike scores byWalk Score

Compare nearby

Grade-compatible schools using the same rating model.
Public-school ratings. Grade-compatible schools within 5 miles, best rated first.
  1. 8.9Compare →
  2. 8.5Compare →
  3. 8.2Compare →
  4. 8.2Compare →
  5. 7.6Compare →
  6. Basis Flagstaff3.7 mi · charter
    6.3Compare →
  7. Mountain Schoolthis school
    5.9
  8. 4.2Compare →
  9. Flagstaff Junior Academy3.8 mi · charter
    3.7Compare →
Eight grade-compatible schools using the same rating model sit within 5 miles, and six rate higher than Mountain School.Public-school ratings. Straight-line distance from this campus. Pins are locations, not attendance boundaries; verify the enrollment path with the district.

Distance is proximity only; it is not attendance eligibility.

Enrollment path unverified: Potential public school; its attendance or application path has not been classified.

Charter · enrollment unverified: Potential charter option; enrollment requirements have not been verified.

The record

What is on file, and where each number came from.

Questions families ask

What grades does Mountain School serve?

Mountain School serves students in grades Kindergarten through 6th.

How many students attend Mountain School?

Mountain School has an enrollment of approximately 168 students.

How does Mountain School rank in AZ?

Mountain School ranks #1,213 of 2,019 schools in AZ.

What is Mountain School's MySchoolScout rating?

Mountain School has a current MySchoolScout rating of 5.9 out of 10. This score combines the level-appropriate components shown in the rating breakdown; equity data is shown separately for context.

What are the test scores at Mountain School?

Based on loaded state assessment records, Mountain School has 60% math proficiency (multi-year average, 2009-2025) and 74% reading/ELA proficiency (multi-year average, 2009-2025).

Is Mountain School a charter school?

Yes, Mountain School is a charter school. Charter schools are publicly funded but independently operated, often with more flexibility in curriculum and teaching methods.

Is Mountain School a Title I school?

No, Mountain School is not currently a Title I school.

School facts

Grades
Kindergarten – 6th
Enrollment
168
Type
Regular
Title I
No
Setting
Small City
County
Coconino County
Rank in district
#1 of 1
Schools in district
1
District spending per student
Not available
A valid denominator was not available for this calculation.
District child poverty rate
Not available
The source release did not match this district identifier.
Area population (ZIP 86005)
17,165
Area average commute
22 min
Area median age
32.1

NCES Common Core of Data (CCD) (SY 2023–24).

Related reading

Data from NCES Common Core of Data, Arizona Dept. of Education, and U.S. Census ACS for the 2023–24 school year. Rankings computed by MySchoolScout. See all data sources.