#1 Private Schools with the Smallest Classes in Naperville, IL
Naperville Christian Academy
Christian school (nondenominational) · Grades Pre-K–12
6.2 students per teacher
Naperville, IL
A+Overall grade126 students6 students per teacher
2026 lists
Private Schools with the Smallest Classes in Naperville, IL
Private schools in Naperville, IL with the fewest students per teacher (not counting preschools and special education schools). Top 9 of 9 schools.
#2 Private Schools with the Smallest Classes in Naperville, IL
Dupage Montessori School
Montessori school · Grades Pre-K–8
9.1 students per teacher
Naperville, IL
B+Overall grade137 students9 students per teacher
#3 Private Schools with the Smallest Classes in Naperville, IL
Calvary Christian School
Christian school (nondenominational) · Grades Pre-K–8
9.9 students per teacher
Naperville, IL
AOverall grade257 students10 students per teacher
#4 Private Schools with the Smallest Classes in Naperville, IL
Covenant Classical School
Christian school (nondenominational) · Grades K–8
10.1 students per teacher
Naperville, IL
B+Overall grade109 students10 students per teacher
#5 Private Schools with the Smallest Classes in Naperville, IL
Icn Noor Academy
Islamic school · Grades Pre-K–5
11.1 students per teacher
Naperville, IL
AOverall grade112 students11 students per teacher
#6 Private Schools with the Smallest Classes in Naperville, IL
Bethany Lutheran Church and School
Lutheran (Missouri Synod) school · Grades Pre-K–8
12.2 students per teacher
Naperville, IL
BOverall grade165 students12 students per teacher
#7 Private Schools with the Smallest Classes in Naperville, IL
St. Raphael Catholic School
Diocesan school · Grades Pre-K–8
13.1 students per teacher
Naperville, IL
A-Overall grade247 students13 students per teacher
#8 Private Schools with the Smallest Classes in Naperville, IL
All Saints Catholic Academy
Parish school · Grades Pre-K–8
14.1 students per teacher
Naperville, IL
A-Overall grade414 students14 students per teacher
#9 Private Schools with the Smallest Classes in Naperville, IL
Saints Peter & Paul School
Diocesan school · Grades Pre-K–8
17.2 students per teacher
Naperville, IL
B-Overall grade435 students17 students per teacher
From official public records, updated October 2026.