Serving 203 students in grades 1-9, Keystone Montessori Charter School ranks in the top 20% of all schools in Arizona for overall test scores (math proficiency is top 30%, and reading proficiency is top 30%).
The percentage of students achieving proficiency in math is 45-49% (which is higher than the Arizona state average of 34%). The percentage of students achieving proficiency in reading/language arts is 80-84% (which is higher than the Arizona state average of 40%).
The student-teacher ratio of 16:1 is lower than the Arizona state level of 17:1.
Minority enrollment is 55% of the student body (majority Hispanic), which is lower than the Arizona state average of 67% (majority Hispanic).
Quick Facts (26-27)
- School Type: Charter School
- Grades: 1-9
- Enrollment: 203 students
- Student-Teacher Ratio: 16:1
- Minority Enrollment: 55%
- Overall Testing Rank: Top 20% in AZ
- Math Proficiency: 45-49% (Top 30%)
- Reading Proficiency: 80-84% (Top 5%)
- Science Proficiency: 40-49% (Top 20%)
- Source: National Center for Education Statistics (NCES), AZ Dept. of Education
Top Rankings
Keystone Montessori Charter School ranks among the top 20% of public schools in Arizona for:
Category
Attribute
Overall Rank
Reading/Language Arts Proficiency
Science Proficiency
School Overview
Keystone Montessori Charter School's student population of 203 students has stayed relatively flat over five school years.
The teacher population of 13 teachers has stayed relatively flat over five school years.
School Type
Grades Offered
Grades 1-9
(No virtual instruction)
(No virtual instruction)
Total Students
203 students
Showing 2015–2025. Full 26-year historical data available below ↓
Total Classroom Teachers
13 teachers
Year Founded
1995
School Calendar
School Rankings
Keystone Montessori Charter School ranks within the top 20% of all 1,921 schools in Arizona (based off of combined math and reading proficiency testing data).
The diversity score of Keystone Montessori Charter School is 0.68, which is more than the diversity score at state average of 0.66. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#245 out of 1921 schools
(Top 20%)
(Top 20%)
Showing 2013–2023. Full 14-year historical data available below ↓
Math Test Scores (% Proficient)
45-49%
34%
Showing 2013–2023. Full 14-year historical data available below ↓
Reading/Language Arts Test Scores (% Proficient)
80-84%
40%
Showing 2012–2022. Full 13-year historical data available below ↓
Science Test Scores (% Proficient)
40-49%
24%
Student-Teacher Ratio
16:1
17:1
American Indian
1%
5%
Asian
5%
3%
Showing 2015–2025. Full 26-year historical data available below ↓
Hispanic
32%
49%
Showing 2015–2025. Full 26-year historical data available below ↓
Black
5%
6%
Showing 2015–2025. Full 26-year historical data available below ↓
White
45%
33%
Showing 2015–2025. Full 26-year historical data available below ↓
Two or more races
12%
4%
Showing 2015–2025. Full 15-year historical data available below ↓
All Ethnic Groups
Showing 2015–2025. Full 26-year historical data available below ↓
Chronically Absent Students
(22-23)24.6%
41.2%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), AZ Dept. of Education
Profile last updated: 09/26/2026
Frequently Asked Questions
What is Keystone Montessori Charter School's ranking?
Keystone Montessori Charter School is ranked #245 out of 1,921 schools, which ranks it among the top 20% of public schools in Arizona.
What schools are Keystone Montessori Charter School often compared to?
Keystone Montessori Charter Schoolis often viewed alongside schools like Horizon Honors Elementary School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
45-49% of students have achieved math proficiency (compared to the 34% AZ state average), while 80-84% of students have achieved reading proficiency (compared to the 40% AZ state average).
How many students attend Keystone Montessori Charter School?
203 students attend Keystone Montessori Charter School.
What is the racial composition of the student body?
45% of Keystone Montessori Charter School students are White, 32% of students are Hispanic, 12% of students are Two or more races, 5% of students are Asian, 5% of students are Black, and 1% of students are American Indian.
What is the student-teacher ratio of Keystone Montessori Charter School?
Keystone Montessori Charter School has a student ration of 16:1, which is lower than the Arizona state average of 17:1.
What grades does Keystone Montessori Charter School offer ?
Keystone Montessori Charter School offers enrollment in grades 1-9 (No virtual instruction).
What school district is Keystone Montessori Charter School part of?
Keystone Montessori Charter School is part of Keystone Montessori Charter School Inc. (10878) School District.
In what neighborhood is Keystone Montessori Charter School located?
Keystone Montessori Charter School is located in the Ahwatukee Foothills Village neighborhood of Phoenix, AZ. There are 17 other public schools located in Ahwatukee Foothills Village.
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