Item: Keystone Montessori Charter School Inc. (10878) School District
Rating: 9
Author: 51����

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Keystone Montessori Charter School Inc. (10878) School District

1025 E Liberty Ln
Phoenix, AZ 85048-8462

Top 20%

Tel: (480) 460-7312

Top Rankings

Keystone Montessori Charter School Inc. (10878) School District ranks among the top 20% of public school district in Arizona for:

Overview

This School District

This State (AZ)

# Schools

1 School

2,470 Schools

# Students

197 Students

1,123,267 Students

# Teachers

n/a

50,033 Teachers

Student-Teacher Ratio

n/a

Student By Grade

View Data

Comparison of Students By Grade Trends
Grade	Keystone Montessori Charter School Inc. (10878) School District	Arizona
1	41	111
2	24	116
3	34	113
4	27	117
5	27	117
6	15	117
7	18	119
8	11	120

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District Rank

Keystone Montessori Charter School Inc. (10878) School District, which is ranked within the top 20% of all 601 school districts in Arizona (based off of combined math and reading proficiency testing data) for the 2022-2023 school year.

This School District

State Average (AZ)

#62 out of 618 school districts
(Top 20%)

View Data

Overall School District Rank Trends
Year	Keystone Montessori Charter School Inc. (10878) School District
2023	#62
2022	#52
2021	#54
2019	#41
2018	#61
2017	#33
2016	#18
2015	#30
2014	#28
2013	#17
2012	#30

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47%

34%

View Data

Math Proficiency Trends
Year	Keystone Montessori Charter School Inc. (10878) School District	Arizona
2023	47%	34%
2022	52%	35%
2021	57%	32%
2019	72%	45%
2018	72%	45%
2017	72%	42%
2016	77%	39%
2015	62%	38%
2014	92%	63%
2013	95%	63%
2012	87%	63%

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80-84%

40%

View Data

Reading and Language Arts Proficiency Trends
Year	Keystone Montessori Charter School Inc. (10878) School District	Arizona
2022	82%	40%
2021	67%	39%
2019	82%	45%
2018	72%	44%
2017	82%	42%
2016	82%	40%
2015	77%	38%
2014	95%	79%
2013	95%	78%
2012	95%	77%
2011	95%	77%

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40-49%

24%

Students by Ethnicity:

0.66

View Data

Comparison of Diversity Score Trends
Year	Keystone Montessori Charter School Inc. (10878) School District	Arizona
2023	0.65	0.65
2022	0.62	0.65
2021	0.59	0.66
2020	0.60	0.65
2019	0.60	0.65
2018	0.55	0.65
2017	0.55	0.65
2016	0.56	0.65
2015	0.55	0.64
2014	0.59	0.64
2013	0.58	0.64
2012	0.61	0.64
2011	0.62	0.65
2010	0.49	0.64
2009	0.50	0.64
2008	0.45	0.63
2007	0.47	0.63
2006	0.48	0.63
2005	0.47	0.62
2004	0.46	0.63
2003	0.39	0.63

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% American Indian

n/a

View Data

American Indian Student Percentage Comparison Over Years (2001-2005)
Year	Keystone Montessori Charter School Inc. (10878) School District	Arizona
2005	1%	7%
2004	1%	8%
2003	1%	8%
2001	1%	8%

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% Asian

View Data

Asian Student Percentage Comparison Over Years (2003-2023)
Year	Keystone Montessori Charter School Inc. (10878) School District	Arizona
2023	7%	3%
2022	9%	3%
2021	7%	3%
2020	8%	3%
2019	8%	3%
2018	9%	3%
2017	9%	3%
2016	7%	3%
2015	8%	3%
2014	10%	3%
2013	11%	3%
2012	14%	3%
2011	15%	3%
2010	16%	3%
2009	16%	3%
2008	16%	3%
2007	16%	3%
2006	16%	2%
2005	14%	2%
2004	14%	2%
2003	9%	2%

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% Hispanic

31%

48%

View Data

Hispanic Student Percentage Comparison Over Years (2003-2023)
Year	Keystone Montessori Charter School Inc. (10878) School District	Arizona
2023	32%	47%
2022	26%	47%
2021	23%	46%
2020	23%	45%
2019	23%	45%
2018	19%	45%
2017	19%	45%
2016	23%	45%
2015	21%	45%
2014	21%	44%
2013	18%	43%
2012	18%	43%
2011	21%	42%
2010	10%	41%
2009	11%	41%
2008	7%	42%
2007	8%	41%
2006	10%	39%
2005	9%	38%
2004	8%	37%
2003	8%	36%

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% Black

View Data

Black Student Percentage Comparison Over Years (2003-2023)
Year	Keystone Montessori Charter School Inc. (10878) School District	Arizona
2023	5%	6%
2022	5%	6%
2021	3%	6%
2020	2%	5%
2019	2%	5%
2018	1%	5%
2017	1%	5%
2016	2%	5%
2015	2%	5%
2014	3%	5%
2013	4%	5%
2012	4%	5%
2011	2%	5%
2010	5%	6%
2009	5%	6%
2008	5%	6%
2007	5%	5%
2006	4%	5%
2005	5%	5%
2004	5%	5%
2003	5%	5%

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% White

48%

34%

View Data

White Student Percentage Comparison Over Years (2003-2023)
Year	Keystone Montessori Charter School Inc. (10878) School District	Arizona
2023	49%	35%
2022	55%	35%
2021	59%	36%
2020	58%	38%
2019	58%	38%
2018	64%	38%
2017	64%	38%
2016	62%	39%
2015	63%	40%
2014	60%	41%
2013	61%	42%
2012	58%	42%
2011	56%	42%
2010	69%	44%
2009	68%	44%
2008	72%	44%
2007	71%	45%
2006	70%	47%
2005	71%	48%
2004	72%	48%
2003	77%	49%

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% Hawaiian

n/a

% Two or more races

11%

View Data

Two or More Races Student Percentage Comparison Over Years (2013-2023)
Year	Keystone Montessori Charter School Inc. (10878) School District	Arizona
2023	7%	4%
2022	5%	4%
2021	8%	4%
2020	8%	3%
2019	8%	3%
2018	7%	3%
2017	7%	3%
2016	6%	3%
2015	6%	2%
2014	6%	2%
2013	6%	2%

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All Ethnic Groups

District Revenue and Spending

The revenue/student of $18,909 is higher than the state median of $11,429. The school district revenue/student has stayed relatively flat over four school years.

The school district's spending/student of $16,782 is higher than the state median of $11,331. The school district spending/student has stayed relatively flat over four school years.

This School District

This State (AZ)

Total Revenue

$4 MM

$12,837 MM

View Data

Total Revenues Trends
Year	Keystone Montessori Charter School Inc. (10878) School District	Arizona
2023	$4 MM	$4 MM
2022	$3 MM	$4 MM
2021	$4 MM	$4 MM
2020	$3 MM	$4 MM
2019	$4 MM	$4 MM
2018	$4 MM	$4 MM
2017	$4 MM	$4 MM
2016	$4 MM	$3 MM
2015	$3 MM	$3 MM
2014	$3 MM	$3 MM
2012	$3 MM	$3 MM
2011	$3 MM	$3 MM
2010	$3 MM	$3 MM
2009	$3 MM	$2 MM
2008	$3 MM	$2 MM
2007	$3 MM	$2 MM
2006	$3 MM	$2 MM
2005	$3 MM	$2 MM
2004	$2 MM	$2 MM
2003	$1 MM	$2 MM
2002	$1 MM	$2 MM

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Spending

$3 MM

$12,727 MM

View Data

Total Expenditure Trends
Year	Keystone Montessori Charter School Inc. (10878) School District	Arizona
2023	$3 MM	$4 MM
2022	$3 MM	$4 MM
2021	$3 MM	$4 MM
2020	$3 MM	$4 MM
2019	$3 MM	$4 MM
2018	$4 MM	$4 MM
2017	$3 MM	$3 MM
2016	$3 MM	$3 MM
2015	$3 MM	$2 MM
2014	$7 MM	$3 MM
2012	$3 MM	$3 MM
2011	$3 MM	$2 MM
2010	$3 MM	$2 MM
2009	$3 MM	$2 MM
2008	$2 MM	$2 MM
2007	$2 MM	$2 MM
2006	$3 MM	$2 MM
2005	$2 MM	$2 MM
2004	$6 MM	$1 MM
2003	$1 MM	$1 MM
2002	$1 MM	$1 MM

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Revenue / Student

$18,909

$11,429

View Data

Average Revenue Per Student Trends
Year	Keystone Montessori Charter School Inc. (10878) School District	Arizona
2023	$20,810	$10,782
2022	$16,379	$10,794
2021	$19,201	$11,986
2020	$16,379	$10,794
2019	$17,251	$11,173
2018	$16,943	$11,763
2017	$15,500	$10,306
2016	$15,136	$9,541
2015	$13,566	$9,449
2014	$12,300	$8,489
2012	$15,338	$9,312
2011	$15,325	$9,958
2010	$15,312	$9,449
2009	$15,124	$9,374
2008	$15,911	$9,689
2007	$15,000	$9,028
2006	$15,067	$7,988
2005	$14,891	$7,640
2004	$11,802	$7,113
2003	$6,719	$6,846
2002	$5,763	$7,000

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Spending / Student

$16,782

$11,331

View Data

Average Expenditure Per Student Trends
Year	Keystone Montessori Charter School Inc. (10878) School District	Arizona
2023	$18,469	$10,054
2022	$15,327	$10,562
2021	$17,041	$11,177
2020	$15,327	$10,562
2019	$16,343	$10,609
2018	$17,209	$11,165
2017	$14,095	$9,883
2016	$12,226	$8,430
2015	$12,908	$8,879
2014	$35,481	$8,678
2012	$14,585	$9,270
2011	$13,473	$9,464
2010	$14,569	$8,879
2009	$16,045	$8,323
2008	$12,974	$8,177
2007	$11,628	$7,648
2006	$17,399	$7,012
2005	$10,793	$6,644
2004	$29,411	$6,165
2003	$5,864	$5,701
2002	$4,734	$6,081

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Best Keystone Montessori Charter School Inc. (10878) School District 51��s (2025-26)

School
(Math and Reading Proficiency)

Location

Quick Facts

Rank: #11.

Keystone Montessori Charter School

Charter School

(Math: 45-49% | Reading: 80-84%)
:

Top 20%

1025 E Liberty Ln
Phoenix, AZ 85048
(480) 460-7312

Gr: 1-9 | 197 students Minority enrollment: 52%

Frequently Asked Questions

How many schools belong to Keystone Montessori Charter School Inc. (10878) School District?

Keystone Montessori Charter School Inc. (10878) School District manages 1 public schools serving 197 students.

What is the rank of Keystone Montessori Charter School Inc. (10878) School District?

Keystone Montessori Charter School Inc. (10878) School District is ranked #78 out of 601 school districts in Arizona (top 20%) based off of combined math and reading proficiency testing data for the 2022-2023 school year. This district ranks in the top 20% of Arizona school districts for: Highest overall rank (Top 20%), Highest math proficiency (Top 20%), Highest reading/language arts proficiency (Top 5%), Highest science proficiency (Top 20%) and Most diverse schools (Top 1%)

What is the racial composition of students in Keystone Montessori Charter School Inc. (10878) School District?

48% of Keystone Montessori Charter School Inc. (10878) School District students are White, 31% of students are Hispanic, 11% of students are Two or more races, 6% of students are Asian, and 4% of students are Black.

What is Keystone Montessori Charter School Inc. (10878) School District's spending/student ratio?

The school district's spending/student of $16,782 is higher than the state median of $11,331. The school district spending/student has stayed relatively flat over four school years.

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Quick Facts (2025-26)

District size: 1 school
Grades: 01-09
Enrollment: 197 students
Minority Enrollment: 52%
: Top 20% in AZ
: 47% (Top 20%)
: 80-84% (Top 5%)
: 40-49% (Top 20%)
Source: National Center for Education Statistics (NCES), AZ Dept. of Education