Mountain School (Ranked Top 5% for 2025-26)

311 W Cattle Drive Trl
Flagstaff, AZ 86005

10/

Top 5%

www.mountaincharterschool.com

Serving 168 students in grades Kindergarten-6, Mountain School ranks in the top 5% of all schools in Arizona for overall test scores (math proficiency is top 10%, and reading proficiency is top 10%).

The percentage of students achieving is 60-64% (which is higher than the Arizona state average of 34%). The percentage of students achieving is 75-79% (which is higher than the Arizona state average of 40%).

Minority enrollment is 22% of the student body (majority Hispanic), which is lower than the Arizona state average of 66% (majority Hispanic).

Quick Facts (2025-26)

School Type: Charter School
Grades: Kindergarten-6
Enrollment: 168 students
Minority Enrollment: 22%
: Top 5% in AZ
: 60-64% (Top 10%)
: 75-79% (Top 5%)
: 40-59% (Top 20%)
Source: National Center for Education Statistics (NCES), AZ Dept. of Education

Top Rankings

Mountain School ranks among the top 20% of public schools in Arizona for:

School Overview

Mountain School's student population of 168 students has declined by 13% over five school years.

School Type

Charter School

Grades Offered

Grades Kindergarten-6
(No virtual instruction)

View Data

Distribution of Students By Grade Trends
Grade	Mountain School
Kind	19
1	31
2	30
3	29
4	28
5	31

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Total Students

168 students

View Data

Total Students Trends Over Years (2002-2022)
Year	Mountain School
2022	179
2021	189
2020	195
2019	195
2018	194
2017	194
2016	195
2015	194
2014	197
2013	204
2012	205
2011	209
2010	209
2009	198
2008	187
2007	145
2006	137
2005	133
2004	126
2003	84
2002	42

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Gender %

Total Classroom Teachers

n/a

Year Founded

1980

School Calendar

View School Calendar

School Motto

Caring, cohesive environment that has the best interests of students and staff at heart

School Rankings

Mountain School ranks within the top 5% of all 1,921 schools in Arizona (based off of combined math and reading proficiency testing data).

The of Mountain School is 0.38, which is less than the diversity score at state average of 0.66. The school's diversity has stayed relatively flat over five school years.

This School

State Level (AZ)

#92 out of 1921 schools
(Top 5%)

View Data

Overall School Rank Trends Over Years (2012-2023)
Year	Mountain School
2023	#92
2022	#104
2021	#258
2019	#329
2018	#303
2017	#309
2016	#318
2015	#427
2014	#410
2013	#249
2012	#230

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60-64%

34%

View Data

Math Proficiency Comparison Over Years (2012-2023)
Year	Mountain School	Arizona	Mountain School Inc. (4203) School District
2023	62%	34%	62%
2022	62%	35%	62%
2021	47%	32%	47%
2019	57%	45%	57%
2018	62%	45%	62%
2017	52%	42%	52%
2016	52%	39%	52%
2015	42%	38%	42%
2014	77%	63%	77%
2013	77%	63%	77%
2012	77%	63%	77%

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75-79%

40%

View Data

Reading and Language Arts Proficiency Comparison Over Years (2011-2022)
Year	Mountain School	Arizona	Mountain School Inc. (4203) School District
2022	77%	40%	77%
2021	67%	39%	67%
2019	72%	45%	72%
2018	67%	44%	62%
2017	72%	42%	72%
2016	62%	40%	62%
2015	62%	38%	62%
2014	87%	79%	87%
2013	92%	78%	92%
2012	92%	77%	92%
2011	92%	77%	92%

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40-59%

24%

Student-Teacher Ratio

n/a

17:1

American Indian

View Data

American Indian Student Percentage Comparison Over Years (2001-2022)
Year	Mountain School	Arizona	Mountain School Inc. (4203) School District
2022	5%	5%	5%
2021	2%	5%	2%
2020	1%	6%	1%
2019	1%	6%	1%
2018	1%	6%	1%
2017	1%	6%	1%
2016	2%	5%	2%
2015	1%	5%	1%
2014	1%	5%	1%
2013	2%	5%	2%
2012	1%	5%	1%
2011	2%	7%	2%
2010	2%	6%	2%
2009	1%	6%	1%
2008	3%	5%	3%
2007	3%	6%	3%
2006	3%	7%	3%
2005	2%	7%	2%
2004	1%	8%	1%
2002	2%	8%	2%
2001	2%	8%	2%

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Asian

View Data

Asian Student Percentage Comparison Over Years (2005-2022)
Year	Mountain School	Arizona	Mountain School Inc. (4203) School District
2022	1%	3%	1%
2021	2%	3%	2%
2020	2%	3%	2%
2019	2%	3%	2%
2018	1%	3%	1%
2017	1%	3%	1%
2015	3%	3%	3%
2014	3%	3%	3%
2013	2%	3%	2%
2012	2%	3%	2%
2011	2%	3%	2%
2010	2%	3%	2%
2009	1%	3%	1%
2008	2%	3%	2%
2007	3%	3%	3%
2006	2%	2%	2%
2005	1%	2%	1%

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Hispanic

10%

48%

View Data

Hispanic Student Percentage Comparison Over Years (2002-2022)
Year	Mountain School	Arizona	Mountain School Inc. (4203) School District
2022	9%	47%	9%
2021	11%	46%	11%
2020	7%	45%	7%
2019	7%	45%	7%
2018	8%	45%	8%
2017	8%	45%	8%
2016	8%	45%	8%
2015	9%	45%	9%
2014	7%	44%	7%
2013	5%	43%	5%
2012	6%	43%	6%
2011	5%	42%	5%
2010	6%	41%	6%
2009	5%	41%	5%
2008	2%	42%	2%
2007	1%	41%	1%
2006	1%	39%	1%
2005	2%	38%	2%
2004	1%	37%	1%
2003	5%	36%	5%
2002	10%	35%	10%

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Black

n/a

View Data

Black Student Percentage Comparison Over Years (1999-2014)
Year	Mountain School	Arizona	Mountain School Inc. (4203) School District
2014	1%	5%	1%
2012	1%	5%	1%
2009	1%	6%	1%
2004	2%	5%	2%
2003	4%	5%	4%
2002	5%	5%	5%
2001	5%	5%	4%
2000	3%	4%	2%
1999	3%	5%	4%

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White

78%

34%

View Data

White Student Percentage Comparison Over Years (2002-2022)
Year	Mountain School	Arizona	Mountain School Inc. (4203) School District
2022	81%	35%	81%
2021	84%	36%	84%
2020	90%	38%	90%
2019	90%	38%	90%
2018	89%	38%	89%
2017	89%	38%	89%
2016	90%	39%	90%
2015	86%	40%	86%
2014	88%	41%	88%
2013	91%	42%	91%
2012	89%	42%	89%
2011	91%	42%	91%
2010	90%	44%	90%
2009	92%	44%	92%
2008	93%	44%	93%
2007	93%	45%	93%
2006	94%	47%	94%
2005	95%	48%	95%
2004	95%	48%	95%
2003	91%	49%	91%
2002	83%	50%	83%

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Hawaiian

n/a

Two or more races

View Data

Two or More Races Student Percentage Comparison Over Years (2015-2022)
Year	Mountain School	Arizona	Mountain School Inc. (4203) School District
2022	4%	4%	4%
2021	1%	4%	1%
2018	1%	3%	1%
2017	1%	3%	1%
2015	1%	2%	1%

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All Ethnic Groups

0.38

0.66

View Data

Diversity Score Comparison Over Years (2002-2022)
Year	Mountain School	Arizona	Mountain School Inc. (4203) School District
2022	0.33	0.65	0.33
2021	0.28	0.66	0.28
2020	0.19	0.65	0.19
2019	0.19	0.65	0.19
2018	0.20	0.65	0.20
2017	0.20	0.65	0.20
2016	0.19	0.65	0.19
2015	0.25	0.64	0.25
2014	0.23	0.64	0.23
2013	0.17	0.64	0.17
2012	0.21	0.64	0.21
2011	0.17	0.65	0.17
2010	0.19	0.64	0.19
2009	0.14	0.64	0.15
2008	0.13	0.63	0.13
2007	0.13	0.63	0.13
2006	0.12	0.63	0.12
2005	0.09	0.62	0.10
2004	0.10	0.63	0.10
2003	0.16	0.63	0.17
2002	0.30	0.62	0.30

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Eligible for

40%

View Data

Free Lunch Eligibility Comparison Over Years (2008-2022)
Year	Mountain School	Arizona	Mountain School Inc. (4203) School District
2022	8%	29%	8%
2021	8%	42%	8%
2020	8%	43%	8%
2019	8%	43%	8%
2008	8%	29%	8%

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Eligible for

10%

View Data

Reduced-Price Lunch Eligibility Comparison Over Years (2008-2022)
Year	Mountain School	Arizona	Mountain School Inc. (4203) School District
2022	4%	2%	4%
2021	4%	9%	4%
2020	4%	7%	4%
2019	4%	7%	4%
2008	4%	9%	4%

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School Statewide Testing

View Education Department Test Scores

School District Name

Mountain School Inc. (4203) School District

Source: National Center for Education Statistics (NCES), AZ Dept. of Education

Profile last updated: 02/09/2025

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Frequently Asked Questions

What is Mountain School's ranking?

Mountain School is ranked #92 out of 1,921 schools, which ranks it among the top 5% of public schools in Arizona.

What schools are Mountain School often compared to?

Mountain Schoolis often viewed alongside schools like Haven Montessori Charter School, Basis Flagstaff, Montessori Charter School Of Flagstaff - Campus by visitors of our site.

What percent of students have achieved state testing proficiency in math and reading?

60-64% of students have achieved math proficiency (compared to the 34% AZ state average), while 75-79% of students have achieved reading proficiency (compared to the 40% AZ state average).

How many students attend Mountain School?

168 students attend Mountain School.

What is the racial composition of the student body?

78% of Mountain School students are White, 10% of students are Hispanic, 5% of students are Two or more races, 4% of students are American Indian, and 3% of students are Asian.

What grades does Mountain School offer ?

Mountain School offers enrollment in grades Kindergarten-6 (No virtual instruction).

What school district is Mountain School part of?

Mountain School is part of Mountain School Inc. (4203) School District.