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Best Delaware Private Schools Belonging to Membership Associations (2026)

For the 2026 school year, there are 82 private schools belonging to membership associations in Delaware.
The most popular school membership associations are National Association of Independent Schools (NAIS) (21% of schools), National Association for the Education of Young Children (18% of schools) and National Catholic Educational Association (NCEA) (17% of schools).

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

Membership Association
# Schools
# Students
% Minority
Accelerated Christian Education (ACE) or (School of Tomorrow)
2
70
100%
American Association of Christian Schools (AACS)
5
724
46%
American Montessori Society (AMS)
6
762
29%
Association Montessori International (AMI)
1
39
79%
Association of Baptist Christian Schools (ABCS)
1
163
12%
Association of Christian Schools International (ACSI)
10
3,097
20%
Association of Christian Teachers and Schools (ACTS)
1
184
13%
Association of Classical and Christian Schools (ACCS)
1
215
-
Association of Delaware Valley Independent Schools
3
1,103
23%
Association of Delaware Valley Independent Schools (ADVIS)
8
3,657
23%
Children and Adults with Attention Deficit or Hyperactivity Disorder (CHADD)
1
97
20%
Council of Bilingual Education
1
28
-
Delaware Association of Independent Schools
12
4,965
25%
Educational Records Bureau
1
162
49%
European Council for International Schools
2
143
-
Friends Council on Education (FCE)
1
707
18%
General Conference of the Seventh Day Adventist Church (GCSDAC)
2
90
84%
International Baccalaureate (IB) World School
1
707
18%
International Boys Schools Coalition
1
162
5%
Learning Disabilities Association of America (LDA)
1
97
20%
Mid Atlantic Christian Schools Association (MACSA)
3
893
16%
Middle States Association of Colleges and Secondary Schools
12
5,337
24%
MSA-CESS Middle States Association Commissions on Elementary and Secondary Schools
2
197
42%
National Association for the Education of Young Children
15
1,132
21%
National Association of Episcopal Schools (NAES)
4
788
35%
National Association of Independent Schools (NAIS)
17
5,621
27%
National Association of Private Catholic and Independent Schools (NAPCIS)
1
91
14%
National Association of Private Special Education Centers
1
-
-
National Catholic Educational Association (NCEA)
14
6,503
16%
National Coalition of Girls
1
208
13%
National Council for Private School Accreditation
1
162
49%
National Independent Private Schools Association
1
31
100%
Other Montessori association(s)
1
84
47%
Other religious school association(s)
4
451
28%
Other school association(s)
11
2,529
24%
Other special emphasis association(s)
5
467
46%
Pennsylvania Association of Independent Schools (PAIS)
4
2,259
32%
Solomon Schechter Day Schools (SSDS)
1
31
100%
The Association of Boarding Schools (TABS)
1
315
37%
The Jewish Community Day School Association (SSDSA)
1
35
9%

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