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Keystone Montessori Charter School

Q: Is Keystone Montessori Charter School a good school?

Keystone Montessori Charter School ranks 138 th of 909 Arizona alternative schools. SchoolDigger rates this school 4 stars out of 5.

Public, Charter, Alternative Grades 1-9

138^th

SchoolDigger Rank ?

of 909 Arizona Alternative Schools

Better than 85% of Arizona alternative schools

Summary

Keystone Montessori Charter School is an alternative public charter school located in Phoenix, Arizona, serving grades 1-9 with a total enrollment of 197 students. This school consistently outperforms the state average in academic proficiency across various grade levels and subjects, with 60-81% of students proficient or better in English Language Arts, compared to the state average of 36-42%. Additionally, the school has relatively low dropout rates, ranging from 3.3% to 6.1% over the past 5 years, which is lower than the state average.

Compared to nearby charter schools, Great Hearts Online - Arizona and Paragon Science Academy have lower proficiency rates in some subjects, while Country Gardens Charter School and Kelly have similar graduation and dropout rates. The BASIS Phoenix South and BASIS Ahwatukee schools in the area have higher academic proficiency rates in many subjects, but also higher dropout rates.

Overall, Keystone Montessori Charter School stands out as a high-performing charter school in the Phoenix area, with consistently strong academic outcomes and a unique Montessori-based educational approach. While the school performs well overall, there may be opportunities to further improve in certain areas, such as mathematics proficiency, which is slightly lower than the school's strong performance in English Language Arts.

203

Students ?

15.6

Student/teacher ratio ?

Free/discounted lunch ?

1025 E Liberty Ln
Phoenix, AZ 85048-8462

(480) 460-7312

District: Keystone Montessori Charter School Inc.

Racial breakdown:

White:

45.3%

Hispanic:

32.0%

Two or more races:

12.3%

See top rated Arizona elementary schools

Compare Keystone Montessori Charter School to nearby alternative schools!

At a glance

▬ Ranking trend: Holding steady — 97th percentile in 2019 → 96th in 2025

Strengths

✓Test scores above the Arizona average (67% vs 40% meeting standards)

✓Ranks in the top 15% of Arizona alternative schools

Worth a look

!Some student groups rank well below the school's overall statewide standing

Students meeting standards (2024-2025) ?

This school67%

District avg67%

Arizona avg40%

Elementary school

138^th of 909

Arizona public elementary schools ?

Top 15%▼ down 12 pts since 2015

From top 4% (2015) to top 15% (2025)

See the entire ranking list of Arizona Elementary Schools →

★★★★★

SchoolDigger rating ?

Middle school

23^rd of 552

Arizona public middle schools ?

Top 4%▼ down 1 pts since 2015

See the entire ranking list of Arizona Middle Schools →

★★★★★

SchoolDigger rating ?

Statewide rank percentile over time (100 = the top-ranked school in the state; click a legend item to add a student group)

Elementary school ranking

Show full rank history (all student groups)

All Students

Year	Avg score	Statewide rank	Arizona percentile	Rating
2025	82.2	138 of 909	84.8%	★★★★☆
2024	83.9	133 of 912	85.4%	★★★★☆
2023	70.9	327 of 1245	73.7%	★★★★☆
2022	91.7	50 of 1000	95.0%	★★★★★
2021	82.1	217 of 1226	82.3%	★★★★☆
2019	90.1	78 of 1039	92.5%	★★★★★
2018	90.8	90 of 1109	91.9%	★★★★★
2017	95.1	33 of 1106	97.0%	★★★★★
2016	93.9	46 of 1079	95.7%	★★★★★
2015	93.2	34 of 955	96.4%	★★★★★
2014	95.3	10 of 1079	99.1%	★★★★★
2013	94.4	5 of 1158	99.6%	★★★★★
2012	88.7	44 of 1141	96.1%	★★★★★
2011	92.0	31 of 1075	97.1%	★★★★★
2010	93.2	24 of 1090	97.8%	★★★★★
2009	94.8	4 of 1062	99.6%	★★★★★

African American

Year	Avg score	Statewide rank	Arizona percentile	Rating
2021	21.1	885 of 895	1.1%	☆☆☆☆☆

Asian

Year	Avg score	Statewide rank	Arizona percentile	Rating
2023	64.7	91 of 316	71.2%	★★★★☆
2022	68.2	73 of 270	73.0%	★★★★☆
2021	37.9	441 of 620	28.9%	★☆☆☆☆

Female

Year	Avg score	Statewide rank	Arizona percentile	Rating
2023	70.9	314 of 1219	74.2%	★★★★☆
2022	69.8	209 of 824	74.6%	★★★★☆
2021	81.3	211 of 1219	82.7%	★★★★☆
2018	87.3	110 of 1023	89.2%	★★★★☆

Hispanic

Year	Avg score	Statewide rank	Arizona percentile	Rating
2023	76.8	195 of 1170	83.3%	★★★★☆
2022	65.0	243 of 716	66.1%	★★★☆☆
2021	88.6	77 of 1198	93.6%	★★★★★

Male

Year	Avg score	Statewide rank	Arizona percentile	Rating
2024	89.2	44 of 628	93.0%	★★★★★
2023	65.0	376 of 1216	69.1%	★★★☆☆
2022	74.4	172 of 830	79.3%	★★★★☆
2021	79.2	228 of 1220	81.3%	★★★★☆
2019	93.1	29 of 850	96.6%	★★★★★
2018	89.7	88 of 1032	91.5%	★★★★★

Multi-racial

Year	Avg score	Statewide rank	Arizona percentile	Rating
2023	54.0	241 of 617	60.9%	★★★☆☆
2021	91.6	11 of 1027	98.9%	★★★★★

Special Education

Year	Avg score	Statewide rank	Arizona percentile	Rating
2023	67.4	157 of 820	80.9%	★★★★☆
2022	80.4	28 of 145	80.7%	★★★★☆
2021	76.7	92 of 1201	92.3%	★★★★★

White

Year	Avg score	Statewide rank	Arizona percentile	Rating
2023	37.7	639 of 1024	37.6%	★★☆☆☆
2022	75.4	119 of 800	85.1%	★★★★☆
2021	70.2	295 of 1161	74.6%	★★★★☆
2019	75.5	109 of 595	81.7%	★★★★☆
2018	82.1	101 of 720	86.0%	★★★★☆

Middle school ranking

Show full rank history (all student groups)

All Students

Year	Avg score	Statewide rank	Arizona percentile	Rating
2025	95.8	23 of 552	95.8%	★★★★★
2023	79.9	128 of 854	85.0%	★★★★☆
2022	96.7	15 of 605	97.5%	★★★★★
2021	95.9	25 of 832	97.0%	★★★★★
2019	94.8	17 of 605	97.2%	★★★★★
2018	89.9	56 of 711	92.1%	★★★★★
2017	91.3	44 of 695	93.7%	★★★★★
2016	91.5	46 of 677	93.2%	★★★★★
2015	96.7	17 of 521	96.7%	★★★★★
2014	89.1	52 of 690	92.5%	★★★★★
2013	93.5	13 of 787	98.3%	★★★★★
2012	89.8	30 of 772	96.1%	★★★★★
2011	86.9	65 of 685	90.5%	★★★★★
2010	93.1	20 of 692	97.1%	★★★★★
2009	94.3	8 of 663	98.8%	★★★★★

Asian

Year	Avg score	Statewide rank	Arizona percentile	Rating
2021	29.0	329 of 404	18.6%	★☆☆☆☆

Female

Year	Avg score	Statewide rank	Arizona percentile	Rating
2023	78.1	130 of 806	83.9%	★★★★☆
2022	89.3	30 of 494	93.9%	★★★★★
2021	94.9	27 of 820	96.7%	★★★★★

Hispanic

Year	Avg score	Statewide rank	Arizona percentile	Rating
2023	76.8	114 of 760	85.0%	★★★★☆
2021	98.7	4 of 802	99.5%	★★★★★

Male

Year	Avg score	Statewide rank	Arizona percentile	Rating
2023	72.0	177 of 810	78.1%	★★★★☆
2022	92.1	23 of 476	95.2%	★★★★★
2021	93.1	32 of 818	96.1%	★★★★★

Multi-racial

Year	Avg score	Statewide rank	Arizona percentile	Rating
2021	95.2	9 of 650	98.6%	★★★★★

Special Education

Year	Avg score	Statewide rank	Arizona percentile	Rating
2022	93.4	2 of 36	94.4%	★★★★★
2021	92.7	13 of 789	98.4%	★★★★★

White

Year	Avg score	Statewide rank	Arizona percentile	Rating
2023	65.7	176 of 675	73.9%	★★★★☆
2022	87.1	29 of 446	93.5%	★★★★★
2021	89.1	31 of 780	96.0%	★★★★★

How student groups rank statewide ? (each group's percentile vs the same group at other schools — higher is better; the +/- beside each compares the group with this school's overall percentile)

Elementary school

Male (2024)93rd percentile+8 vs school

Hispanic (2023)83rd percentile+10 vs school

Special Education (2023)81st percentile+7 vs school

Female (2023)74th percentile~ school

Asian (2023)71st percentile-3 vs school

Multi-racial (2023)61st percentile-13 vs school

White (2023)38th percentile-36 vs school

African American (2021)1st percentile-81 vs school

Middle school

Multi-racial (2021)99th percentile~ school

Special Education (2022)94th percentile-3 vs school

Hispanic (2023)85th percentile~ school

Female (2023)84th percentile~ school

Male (2023)78th percentile-7 vs school

White (2023)74th percentile-11 vs school

Asian (2021)19th percentile-78 vs school

By subject vs Arizona (2024-2025) ?

English Language Arts70%+29 vs state

Science48%+14 vs state

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Schools Near Keystone Montessori Charter School

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Ranking:

E Elementary M Middle H High A Alternative P Private

Choose columns to see: Summary School Students/Teachers Ranking Test Scores Finance All

School													Students/Teachers											Ranking ()				Ranking ()				AASA English Language Arts (2025)							AASA Mathematics (2025)							AzSCI Science (2025)			Per Pupil Expenditures (2022)
Name	Type	Grades	Address	City	Zip	County	District	Is Charter	Is Magnet	Is Virtual	Is Title I	Phone	Enrollment	Full-time Teachers	Student/ Teacher Ratio	Free/Discounted Lunch Recipients	White	Black	Hispanic	Asian	American Indian	Pacific Islander	Two or More Races	Average Standard Score ()	Statewide Rank ()	State Percentile ()	SchoolDigger Rating ()	Average Standard Score ()	Statewide Rank ()	State Percentile ()	Rank Change from Previous Year	AASA English Language Arts 3rd Grade	AASA English Language Arts 4th Grade	AASA English Language Arts 5th Grade	AASA English Language Arts 6th Grade	AASA English Language Arts 7th Grade	AASA English Language Arts 8th Grade	AASA English Language Arts 11th Grade	AASA Mathematics 3rd Grade	AASA Mathematics 4th Grade	AASA Mathematics 5th Grade	AASA Mathematics 6th Grade	AASA Mathematics 7th Grade	AASA Mathematics 8th Grade	AASA Mathematics 11th Grade	AzSCI Science 5th Grade	AzSCI Science 8th Grade	AzSCI Science 11th Grade	Per Pupil Expenditures: Total	Personnel Spending from Federal Funds	Non-Personnel Spending from Federal Funds	Sub-total from Federal Funds	Personnel Spending from State and Local Funds	Non-Personnel from State and Local Funds	Sub-total Spending from State and Local Funds
Keystone Montessori Charter School	Public, Charter, Alternative	1-9	1025 E Liberty Ln	Phoenix	85048	Maricopa County	Keystone Montessori Charter School Inc.	Yes	(n/a)	No	No	(480) 460-7312	203	13	15.6		92 (45.3%)	9 (4.4%)	65 (32.0%)	11 (5.4%)	1 (0.5%)	0 (0.0%)	25 (12.3%)								(n/a)	60.0	60.0	63.0	75.0	79.0	81.0									48.0				$00			$00
The Paideia Academy of South Phoenix	Public, Charter, Alternative	K-12	7777 S 15th Ter	Phoenix	85042	Maricopa County	The Paideia Academies Inc	Yes	(n/a)	No	Yes	(602) 343-3040	579	39	14.8		53 (9.2%)	96 (16.6%)	406 (70.1%)	6 (1.0%)	4 (0.7%)	4 (0.7%)	10 (1.7%)								(n/a)	25.0	35.0	18.0	30.0				30.0	24.0						14.0				$00			$00
BASIS Ahwatukee	Public, Charter, Alternative	4-12	10210 S 50th Pl	Phoenix	85044	Maricopa County	BASIS Charter Schools Inc.	Yes	(n/a)	No	No	(480) 659-2294	661	53	12.4		99 (15.0%)	73 (11.0%)	48 (7.3%)	388 (58.7%)	5 (0.8%)	1 (0.2%)	47 (7.1%)								(n/a)		84.0	69.0	85.0	82.0	87.0			85.0	62.0	78.0	87.0	90.0		62.0	80.0	85.0	$8,768	$254	$30	$537	$6,241	$2,244	$8,485
ASU Preparatory Academy - South Phoenix Intermediate	Public, Charter, Alternative	PK, KG-12	5610 S. Central Avenue	Phoenix	85040	Maricopa County	ASU Preparatory Academy	Yes	(n/a)	No	Yes	(602) 551-6594	99	9	11.0		4 (4.0%)	7 (7.1%)	81 (81.8%)	1 (1.0%)	2 (2.0%)	0 (0.0%)	4 (4.0%)								(n/a)																			$00			$00
Desert Marigold School	Public, Charter, Alternative	K-12	6210 S 28th St	Phoenix	85042	Maricopa County	Valley of the Sun Waldorf Education Association d	Yes	(n/a)	No	No	(602) 243-6909	286				173 (60.5%)	8 (2.8%)	77 (26.9%)	6 (2.1%)	2 (0.7%)	0 (0.0%)	20 (7.0%)								(n/a)						50.0										54.0			$00			$00
BASIS Phoenix South	Public, Charter, Alternative	K-12	5700 S 19th Ave	Phoenix	85041	Maricopa County	BASIS Charter Schools Inc.	Yes	(n/a)	No	Yes	(602) 962-7393	523	47	11.1		39 (7.5%)	142 (27.2%)	238 (45.5%)	72 (13.8%)	5 (1.0%)	0 (0.0%)	27 (5.2%)								(n/a)	46.0	38.0	30.0	48.0	69.0	81.0		63.0		32.0	27.0	50.0			20.0	57.0		$12,233	$658	$56	$1,372	$7,547	$3,972	$11,519
Kelly	Public, Charter, Alternative	K-12	1648 S 16th St	Phoenix	85034	Maricopa County	Edkey Inc. - Sequoia School for the Deaf and Hard	Yes	(n/a)	No	No	(602) 712-0500	21	5	4.2		5 (23.8%)	5 (23.8%)	10 (47.6%)	0 (0.0%)	1 (4.8%)	0 (0.0%)	0 (0.0%)								(n/a)																		$54,496	$5,871	$1,155	$12,896	$21,040	$26,430	$47,470
Paragon Science Academy	Public, Charter, Alternative	K-12	2975 W Linda Ln	Chandler	85224	Maricopa County	Daisy Education Corporation dba Paragon Science Ac	Yes	(n/a)	No	Yes	(480) 814-1600	601	36	16.5		205 (34.1%)	190 (31.6%)	46 (7.7%)	120 (20.0%)	8 (1.3%)	1 (0.2%)	31 (5.2%)								(n/a)	43.0	61.0	67.0	70.0	64.0	50.0	84.0	80.0	58.0	73.0	40.0	51.0	27.0	73.0	61.0	46.0	60.0		$00			$00
Country Gardens Charter School	Public, Charter, Alternative	K-12	6313 W Southern Ave	Laveen	85339	Maricopa County	Country Gardens Charter Schools	Yes	(n/a)	No	Yes	(623) 900-2230	268	18	15.0		65 (24.3%)	54 (20.1%)	133 (49.6%)	2 (0.7%)	4 (1.5%)	1 (0.4%)	9 (3.4%)								(n/a)					42.0														$00			$00
Nueva Vista School / Arizona State Hospital	Public, Alternative	K-12	2500 E Van Buren St # G1181	Phoenix	85008	Maricopa County	Arizona State Hospital	No	(n/a)	No	No	(602) 244-1331	0				0 ()	0 ()	0 ()	0 ()	0 ()	0 ()	0 ()								(n/a)

Frequently Asked Questions about Keystone Montessori Charter School

What is the racial makeup of Keystone Montessori Charter School?

Students at Keystone Montessori Charter School are 45% White, 32% Hispanic, 12% Two or more races, 5% Asian, 4% African American.

Is Keystone Montessori Charter School a good school?

Keystone Montessori Charter School ranks 138^th of 909 Arizona alternative schools. SchoolDigger rates this school 4 stars out of 5.

What district is Keystone Montessori Charter School in?

Keystone Montessori Charter School Inc.

How many students attend Keystone Montessori Charter School?

In the 2024-25 school year, 203 students attended Keystone Montessori Charter School.

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Latest Arizona data All new data »

2024–25 dropout ratesDec 2, 2025

2024–25 graduation ratesNov 7, 2025

2024–25 AASA & AzSCI test scoresOct 10, 2025

2023–24 dropout ratesJun 30, 2025

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.