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Best Arizona Private Schools Belonging to Membership Associations (2026)

For the 2026 school year, there are 282 private schools belonging to membership associations in Arizona.
The most popular school membership associations are Association of Christian Schools International (ACSI) (21% of schools), National Catholic Educational Association (NCEA) (20% of schools) and Other school association(s) (13% of schools).

Top-Ranked Arizona Private Schools by Membership Association (2026)

Membership Association
# Schools
# Students
% Minority
Accelerated Christian Education (ACE) or (School of Tomorrow)
4
79
76%
American Association of Christian Schools (AACS)
6
445
32%
American Montessori Society (AMS)
18
1,645
39%
Association Montessori International (AMI)
14
1,457
40%
Association Montessori Internationale (AMI)
3
348
42%
Association of Christian Schools International (ACSI)
59
17,543
21%
Association of Christian Teachers and Schools (ACTS)
2
240
23%
Association of Classical and Christian Schools (ACCS)
5
1,080
19%
Association of Colorado Independent Schools (ACIS)
1
203
16%
Association of Waldorf Schools of North America
1
223
20%
Bilingual School Association
1
587
10%
Children and Adults with Attention Deficit or Hyperactivity Disorder (CHADD)
1
167
-
Christian Schools International (CSI)
5
895
22%
Cognia
34
11,400
22%
Council of Bilingual Education
2
120
42%
Educational Records Bureau
2
2,164
22%
European Council for International Schools
2
483
16%
Evangelical Lutheran Education Association (ELEA)
6
467
37%
General Conference of SDA Church
1
16
56%
General Conference of the Seventh Day Adventist Church (GCSDAC)
6
468
70%
Independent Schools Association of the South West (ISAS)
2
915
28%
Institute for Independent Education
2
289
24%
International Montessori Council (IMC)
2
443
38%
Islamic School League of America (ISLA)
1
75
100%
Jesuit Secondary Education Association (JSEA)
2
2,037
32%
Learning Disabilities Association of America (LDA)
2
200
-
Middle States Association of Colleges and Secondary Schools
1
74
33%
National Association for the Education of Young Children
33
3,166
35%
National Association for the Gifted
1
26
46%
National Association of Episcopal Schools (NAES)
7
1,163
42%
National Association of Independent Schools (NAIS)
12
3,097
40%
National Association of Laboratory Schools
2
311
100%
National Association of Private Schools
1
273
16%
National Association of Private Special Education Centers
2
152
57%
National Catholic Education Association
1
404
47%
National Catholic Educational Association (NCEA)
56
18,594
58%
National Coalition of Alternative Community Schools
1
133
26%
National Council for Private School Accreditation
4
436
40%
National Independent Private Schools Association
5
1,177
33%
National Junior Honor Society (NJHS)
1
384
38%
National Lutheran Schools Accreditation
4
1,969
16%
National Society of Hebrew Day Schools (NSHDS)
3
448
1%
Northwest Association of Accredited Schools
2
50
29%
Not Available (School did not report any membership associatons).
1
91
20%
Other associations(s) for exceptional children
6
750
32%
Other Montessori association(s)
6
941
18%
Other religious school association(s)
33
9,065
45%
Other school association(s)
36
6,095
46%
Other special emphasis association(s)
8
773
45%
Pennsylvania Association of Independent Schools (PAIS)
1
110
94%
Southern Baptist Association of Christian Schools (SBACS)
2
85
40%
State or regional independent school association
6
1,620
29%
The Association of Boarding Schools (TABS)
1
99
32%
Waldorf Early Childhood Association of North America
1
223
20%
Western Association of Schools and Colleges (WASC)
8
1,586
48%
Wisconsin Evangelical Lutheran Synod School Accreditation (WELSSA)
2
336
17%

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