Keystone Montessori Charter School

Summary:

Keystone Montessori Charter School is an alternative public charter school in Phoenix, Arizona, serving 179 students in grades 1-9. The school follows the Montessori educational philosophy, which emphasizes hands-on, self-directed learning.

Keystone Montessori consistently outperforms the state average in standardized test scores across multiple grade levels and subjects. For example, in the 2022-2023 school year, 83% of 8th-grade students were proficient or better in AASA/English Language Arts, compared to the state average of 37%. The school's 3rd-grade students also performed exceptionally well, with 76% proficient or better in AASA/English Language Arts, compared to the state average of 39%. In mathematics, Keystone Montessori's 8th-grade students had a 59% proficiency rate, significantly higher than the state's 27%. Additionally, the school has maintained a 0% dropout rate for the past five school years, indicating a high level of student retention and engagement.

Keystone Montessori's academic performance is significantly higher than many of the nearby charter schools, such as Great Hearts Online - Arizona, Paragon Science Academy, and the schools under the ASU Preparatory Academy district. The school's adherence to the Montessori educational philosophy and its access to additional resources may contribute to its success in providing a unique and effective learning environment for its students.


Detail:

Public, Charter, Alternative 1-9

 1025 E Liberty Ln
       Phoenix, AZ  85048-8462


(480) 460-7312

District: Keystone Montessori Charter School Inc.

SchoolDigger Rank:
134th of 904 Arizona Alternative Schools


Student/teacher ratio:  0.0 Help
Number of students:  179

Racial breakdown:

White:
48.6%
Hispanic:
31.8%
Two or more races:
7.3%
more

Free/discounted lunch recipients:  0% Help


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Performance Trends
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Compare Details Keystone Montessori Charter School ranks better than 85.2% of elementary schools in Arizona. (See more...)
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Compare Details In 2024 the calculated Average Standard Score was 83.9. (See more...)
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Compare Details Keystone Montessori Charter School is not ranked due for the most recent year due to insufficient test score data. (See more...)
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Compare Details In 2023 the calculated Average Standard Score was 79.88. (See more...)
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The high school dropout rate measures the percentage of students who do not complete their high school education.
Student Body
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Compare Details Racial makeup is: White (48.6%), Hispanic (31.8%), two or more races (7.3%). (See more...)
Finance
Schooldigger 2024 Rankings:

Keystone Montessori Charter School:

SchoolDigger ranks Keystone Montessori Charter School 134th of 904 Arizona public elementary schools. (See Keystone Montessori Charter School in the ranking list.)

Elementary School Test Score Ratings by Student Subgroup:


Male students:




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Rank History for Keystone Montessori Charter School

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Rank History for all elementary school students at Keystone Montessori Charter School

Year Avg Standard Score Statewide Rank Total # Ranked Elementary Schools AZ State Percentile SchoolDigger Rating
2009 94.77 4th 1062 99.6%
2010 93.16 24th 1090 97.8%
2011 92.02 31st 1075 97.1%
2012 88.74 44th 1141 96.1%
2013 94.37 5th 1158 99.6%
2014 95.33 10th 1079 99.1%
2015 93.18 34th 955 96.4%
2016 93.88 46th 1079 95.7%
2017 95.11 33rd 1106 97.0%
2018 90.78 90th 1109 91.9%
2019 90.11 78th 1039 92.5%
2021 82.11 217th 1226 82.3%
2022 91.68 50th 1000 95.0%
2023 70.94 327th 1245 73.7%
2024 83.90 134th 904 85.2%
See the entire list of Arizona Alternative School Rankings!

Rank History for elementary school Multi-racial students at Keystone Montessori Charter School

Year Avg Standard Score Statewide Rank Total # Ranked Elementary Schools AZ State Percentile SchoolDigger Rating
2021 91.65 11th 1027 98.9%
2023 53.96 241st 617 60.9%
See the entire list of Best Arizona Alternative Schools for Multi-racial Students!

Rank History for elementary school Special Education students at Keystone Montessori Charter School

Year Avg Standard Score Statewide Rank Total # Ranked Elementary Schools AZ State Percentile SchoolDigger Rating
2021 76.66 92nd 1201 92.3%
2022 80.39 28th 145 80.7%
2023 67.44 157th 820 80.9%
See the entire list of Best Arizona Alternative Schools for Special Education Students!

Rank History for elementary school Female students at Keystone Montessori Charter School

Year Avg Standard Score Statewide Rank Total # Ranked Elementary Schools AZ State Percentile SchoolDigger Rating
2018 87.33 110th 1023 89.2%
2021 81.33 211th 1219 82.7%
2022 69.79 209th 824 74.6%
2023 70.87 314th 1219 74.2%
See the entire list of Best Arizona Alternative Schools for Female Students!

Rank History for elementary school Male students at Keystone Montessori Charter School

Year Avg Standard Score Statewide Rank Total # Ranked Elementary Schools AZ State Percentile SchoolDigger Rating
2018 89.69 88th 1032 91.5%
2019 93.07 29th 850 96.6%
2021 79.15 228th 1220 81.3%
2022 74.43 172nd 830 79.3%
2023 65.00 376th 1216 69.1%
2024 89.15 47th 609 92.3%
See the entire list of Best Arizona Alternative Schools for Male Students!

Rank History for elementary school Asian students at Keystone Montessori Charter School

Year Avg Standard Score Statewide Rank Total # Ranked Elementary Schools AZ State Percentile SchoolDigger Rating
2021 37.87 441st 620 28.9%
2022 68.18 73rd 270 73.0%
2023 64.68 91st 316 71.2%
See the entire list of Best Arizona Alternative Schools for Asian Students!

Rank History for elementary school African American students at Keystone Montessori Charter School

Year Avg Standard Score Statewide Rank Total # Ranked Elementary Schools AZ State Percentile SchoolDigger Rating
2021 21.08 885th 895 1.1%
See the entire list of Best Arizona Alternative Schools for African American Students!

Rank History for elementary school Hispanic students at Keystone Montessori Charter School

Year Avg Standard Score Statewide Rank Total # Ranked Elementary Schools AZ State Percentile SchoolDigger Rating
2021 88.56 77th 1198 93.6%
2022 65.03 243rd 716 66.1%
2023 76.84 195th 1170 83.3%
See the entire list of Best Arizona Alternative Schools for Hispanic Students!

Rank History for elementary school White students at Keystone Montessori Charter School

Year Avg Standard Score Statewide Rank Total # Ranked Elementary Schools AZ State Percentile SchoolDigger Rating
2018 82.14 101st 720 86.0%
2019 75.49 109th 595 81.7%
2021 70.24 295th 1161 74.6%
2022 75.38 119th 800 85.1%
2023 37.69 639th 1024 37.6%
See the entire list of Best Arizona Alternative Schools for White Students!

Data source: test scores: Arizona Department of Education, rankings: SchoolDigger.com

Rank History for Keystone Montessori Charter School

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Rank History for all middle school students at Keystone Montessori Charter School

Year Avg Standard Score Statewide Rank Total # Ranked Middle Schools AZ State Percentile SchoolDigger Rating
2009 94.28 8th 663 98.8%
2010 93.05 20th 692 97.1%
2011 86.92 65th 685 90.5%
2012 89.84 30th 772 96.1%
2013 93.50 13th 787 98.3%
2014 89.05 52nd 690 92.5%
2015 96.66 17th 521 96.7%
2016 91.48 46th 677 93.2%
2017 91.29 44th 695 93.7%
2018 89.93 56th 711 92.1%
2019 94.84 17th 605 97.2%
2021 95.91 25th 832 97.0%
2022 96.75 15th 605 97.5%
2023 79.88 128th 854 85.0%
See the entire list of Arizona Alternative School Rankings!

Rank History for middle school Multi-racial students at Keystone Montessori Charter School

Year Avg Standard Score Statewide Rank Total # Ranked Middle Schools AZ State Percentile SchoolDigger Rating
2021 95.20 9th 650 98.6%
See the entire list of Best Arizona Alternative Schools for Multi-racial Students!

Rank History for middle school Special Education students at Keystone Montessori Charter School

Year Avg Standard Score Statewide Rank Total # Ranked Middle Schools AZ State Percentile SchoolDigger Rating
2021 92.74 13th 789 98.4%
2022 93.37 2nd 36 94.4%
See the entire list of Best Arizona Alternative Schools for Special Education Students!

Rank History for middle school Female students at Keystone Montessori Charter School

Year Avg Standard Score Statewide Rank Total # Ranked Middle Schools AZ State Percentile SchoolDigger Rating
2021 94.87 27th 820 96.7%
2022 89.33 30th 494 93.9%
2023 78.15 130th 806 83.9%
See the entire list of Best Arizona Alternative Schools for Female Students!

Rank History for middle school Male students at Keystone Montessori Charter School

Year Avg Standard Score Statewide Rank Total # Ranked Middle Schools AZ State Percentile SchoolDigger Rating
2021 93.14 32nd 818 96.1%
2022 92.09 23rd 476 95.2%
2023 71.97 177th 810 78.1%
See the entire list of Best Arizona Alternative Schools for Male Students!

Rank History for middle school Asian students at Keystone Montessori Charter School

Year Avg Standard Score Statewide Rank Total # Ranked Middle Schools AZ State Percentile SchoolDigger Rating
2021 28.96 329th 404 18.6%
See the entire list of Best Arizona Alternative Schools for Asian Students!

Rank History for middle school Hispanic students at Keystone Montessori Charter School

Year Avg Standard Score Statewide Rank Total # Ranked Middle Schools AZ State Percentile SchoolDigger Rating
2021 98.66 4th 802 99.5%
2023 76.76 114th 760 85.0%
See the entire list of Best Arizona Alternative Schools for Hispanic Students!

Rank History for middle school White students at Keystone Montessori Charter School

Year Avg Standard Score Statewide Rank Total # Ranked Middle Schools AZ State Percentile SchoolDigger Rating
2021 89.12 31st 780 96.0%
2022 87.12 29th 446 93.5%
2023 65.70 176th 675 73.9%
See the entire list of Best Arizona Alternative Schools for White Students!

Data source: test scores: Arizona Department of Education, rankings: SchoolDigger.com

As you review the school rankings data, please be aware that some of the information from certain demographics is missing. The reason for this omission is that the data has been redacted from the source data itself due to low population samples in these specific demographic groups.

Redacting data from low population samples is a necessary step to ensure the reliability and accuracy of the results, as small sample sizes may not be representative of the broader population. Additionally, this measure helps protect the privacy of individuals belonging to these demographic groups.

Keystone Montessori Charter School Test Scores
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Grades: 
  
Years: 
  
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Data source: Arizona Department of Education

Review counts

All ratings (Avg rating: 5)
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0%

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Enrollment information for Keystone Montessori Charter School

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Year White African American Asian Hispanic American Indian Pacific Islander Two or More Races Not Specified Total
2000 58 9 6 5 0 n/a n/a 0 78
2001 89 14 10 11 1 n/a n/a 0 125
2002 155 10 17 15 2 n/a n/a 0 199
2003 155 10 17 15 2 n/a n/a 0 199
2004 144 9 27 15 2 n/a n/a 0 197
2005 124 8 25 15 2 n/a n/a 0 174
2006 124 8 29 17 0 n/a n/a 0 178
2007 136 10 30 15 0 n/a n/a 0 191
2008 139 9 30 14 0 n/a n/a 0 192
2009 137 11 31 22 0 n/a n/a 0 201
2010 139 11 32 20 0 n/a n/a 0 202
2011 113 5 30 42 0 0 13 0 203
2012 120 8 28 37 0 0 14 0 207
2013 122 8 23 36 0 0 12 0 201
2014 125 7 20 44 0 0 14 0 210
2015 142 5 20 46 0 0 15 0 228
2016 145 6 16 52 0 0 16 0 235
2017 148 3 20 44 0 0 17 0 232
2018 125 3 15 50 0 0 18 0 211
2019 121 4 16 48 0 1 17 0 207
2020 127 4 14 45 0 0 21 0 211
2021 114 5 14 45 0 0 16 0 194
2022 102 9 16 48 0 0 10 0 185
2023 87 9 12 57 0 1 13 0 179

Data source: National Center for Education Statistics, U.S. Dept of Education.

About Enrollment/Ethnicity

For more information about how the Department of Education defines ethnicity, see Defining Race and Ethnicity Data, National Center for Education Statistics

Students eligible for free or discounted lunch at Keystone Montessori Charter School

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Year # Students Full-time Teachers Student/Teacher ratio % Free/Discounted Lunch
2000 78 n/a 0.0 n/a
2001 125 n/a 0.0 n/a
2002 199 n/a n/a n/a
2003 199 n/a n/a n/a
2004 197 n/a n/a n/a
2005 174 n/a n/a n/a
2006 178 n/a n/a n/a
2007 191 n/a n/a n/a
2008 192 n/a n/a n/a
2009 201 n/a n/a n/a
2010 202 n/a n/a n/a
2011 203 n/a n/a 0
2012 207 n/a n/a n/a
2013 201 n/a n/a n/a
2014 210 n/a n/a n/a
2015 228 n/a n/a n/a
2016 235 n/a n/a n/a
2017 232 n/a n/a n/a
2018 211 n/a n/a n/a
2019 207 n/a n/a n/a
2020 211 n/a n/a n/a
2021 194 n/a n/a n/a
2022 185 n/a n/a n/a
2023 179 n/a n/a n/a

Data source: National Center for Education Statistics, U.S. Dept of Education.

About Students eligible for discounted/free lunch:

The National School Lunch Program (NSLP) provides low-cost or free meals to students in U.S. public and nonprofit private schools based on household income. Those with incomes below 130% of the poverty line receive free lunch, while those between 130% and 185% qualify for reduced-price lunch. The percentage of students receiving free or reduced-price lunch serves as a marker for poverty, as it reflects the socioeconomic status of families in a given school or district. A higher FRPL rate typically indicates a higher concentration of low-income families, suggesting that the school or district may face additional challenges in providing adequate resources and support for student success.

Student/Teacher Ratio Keystone Montessori Charter School

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Compare
Year # Students Full-time Teachers Student/Teacher ratio % Free/Discounted Lunch
2000 78 n/a 0.0 n/a
2001 125 n/a 0.0 n/a
2002 199 n/a n/a n/a
2003 199 n/a n/a n/a
2004 197 n/a n/a n/a
2005 174 n/a n/a n/a
2006 178 n/a n/a n/a
2007 191 n/a n/a n/a
2008 192 n/a n/a n/a
2009 201 n/a n/a n/a
2010 202 n/a n/a n/a
2011 203 n/a n/a 0
2012 207 n/a n/a n/a
2013 201 n/a n/a n/a
2014 210 n/a n/a n/a
2015 228 n/a n/a n/a
2016 235 n/a n/a n/a
2017 232 n/a n/a n/a
2018 211 n/a n/a n/a
2019 207 n/a n/a n/a
2020 211 n/a n/a n/a
2021 194 n/a n/a n/a
2022 185 n/a n/a n/a
2023 179 n/a n/a n/a

Data source: National Center for Education Statistics, U.S. Dept of Education.

About Student-Teacher Ratio

Student/teacher ratio is calculated by dividing the total number of students by the total number of full-time equivalent teachers. Please note that a smaller student/teacher ratio does not necessarily translate to smaller class size. In some instances, schools hire teachers part time, and some teachers are hired for specialized instruction with very small class sizes. These and other factors contribute to the student/teacher ratio. Note: For private schools, Student/teacher ratio may not include Pre-Kindergarten.
Finances

Per Pupil Expenditures for Keystone Montessori Charter School

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YearPersonnel Expenditures from Federal FundsNon-Personnel Expenditures from Federal FundsTotal Expenditures from Federal FundsPersonnel Expenditures from State and Local FundsNon-Personnel Expenditures from State and Local FundsTotal Expenditures from State and Local FundsTotal Expenditures Per Pupil (All Funds)
2019 $110 (0.7%) $00 (0.0%) $221 (1.3%) $13,415 (79.6%) $3,321 (19.7%) $16,737 (99.3%) $16,847
2020 $48 (0.3%) $106 (0.7%) $201 (1.4%) $11,178 (76.6%) $3,262 (22.4%) $14,440 (98.9%) $14,594

Data source: Arizona Department of Education
Pre and Post Pandemic Data

Impact of COVID-19 on Keystone Montessori Charter School

The coronavirus has had a profound impact on education in America. Learning shifted online overnight, attendance numbers dwindled, and enrollment decreased. SchoolDigger.com is making it easier for you to better assess how COVID-19 has impacted your school. Through the collection of pre-pandemic (2019) and current data, SchoolDigger.com is sharing test scores, enrollment numbers and school demographics from schools across the country – and we make it easy to see how impacted schools compare locally and statewide.

Rankings

Rank
Pre-pandemic (2018-2019)
Rank
Post pandemic (2022-2023)
Change (%)
Ranks 78th of 1039 Elementary schoolsRanks 327th of 1245 Elementary schools
 18.8%
Ranks 17th of 605 Middle schoolsRanks 128th of 854 Middle schools
 12.2%

Student Body

Number of students
Pre-pandemic (2018-2019)
Number of students
Post pandemic (2022-2023)
Change (%)
Total Students207179
 13.5%
African American49
 125%
American Indian00
Asian1612
 25%
Hispanic4857
 18.8%
Pacific Islander11
White12187
 28.1%
Two or More Races1713
 23.5%


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Frequently Asked Questions about Keystone Montessori Charter School

Keystone Montessori Charter School ranks 134th of 904 Arizona alternative schools. SchoolDigger rates this school 4 stars out of 5.

In the 2022-23 school year, 179 students attended Keystone Montessori Charter School.

Students at Keystone Montessori Charter School are 49% White, 32% Hispanic, 7% Two or more races, 7% Asian, 5% African American.


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SchoolDigger data sources: National Center for Education Statistics, U.S. Department of Education, the U.S. Census Bureau and the Arizona Department of Education.

IMPORTANT DISCLAIMERS: Not all boundaries are included. We make every effort to ensure that boundaries are up-to-date. But it's important to note that these are approximations and are for general informational purposes only. To verify legal descriptions of boundaries or school locations, contact your local tax assessor's office and/or school district.





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