#1 Private Schools with the Smallest Classes in Idaho
Sun Valley Community School-Upper
Independent school · Grades Pre-K–12
5 students per teacher
Sun Valley, ID
A+Overall grade397 students5 students per teacher
2026 lists
Private Schools with the Smallest Classes in Idaho
Private schools in Idaho with the fewest students per teacher (not counting preschools and special education schools). Top 50 of 63 schools.
#2 Private Schools with the Smallest Classes in Idaho
Riverstone International School
Independent school · Grades Pre-K–12
5 students per teacher
Boise, ID
A+Overall grade349 students5 students per teacher
#3 Private Schools with the Smallest Classes in Idaho
St. Marys School
Diocesan school · Grades Pre-K–8
6 students per teacher
Boise, ID
A+Overall grade109 students6 students per teacher
#4 Private Schools with the Smallest Classes in Idaho
Canyonside Christian School
Christian school (nondenominational) · Grades Pre-K–6
6 students per teacher
Jerome, ID
AOverall grade65 students6 students per teacher
#5 Private Schools with the Smallest Classes in Idaho
Boise State University Trio Upward Bound
Alternative school · Grades 9–11
6.2 students per teacher
Boise, ID
A-Overall grade80 students6 students per teacher
#6 Private Schools with the Smallest Classes in Idaho
A Child's Choice Montessori School
Montessori school · Grades Pre-K–6
6.2 students per teacher
Meridian, ID
AOverall grade52 students6 students per teacher
#7 Private Schools with the Smallest Classes in Idaho
The Sage School
Alternative school · Grades 6–12
6.5 students per teacher
Hailey, ID
A-Overall grade91 students7 students per teacher
#8 Private Schools with the Smallest Classes in Idaho
Hope Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–7
6.9 students per teacher
Idaho Falls, ID
AOverall grade45 students7 students per teacher
#9 Private Schools with the Smallest Classes in Idaho
Sun Valley Community School
Independent school · Grades Pre-K–12
7.3 students per teacher
Sun Valley, ID
B+Overall grade391 students7 students per teacher
#10 Private Schools with the Smallest Classes in Idaho
Pocatello Valley Montessori School
Montessori school · Grades Pre-K–5
7.3 students per teacher
Pocatello, ID
B+Overall grade48 students7 students per teacher
#11 Private Schools with the Smallest Classes in Idaho
Pine Grove Academy
Latter-day Saints school · Grades Pre-K–8
7.4 students per teacher
Post Falls, ID
BOverall grade102 students7 students per teacher
#12 Private Schools with the Smallest Classes in Idaho
Sun Valley Community School-Middle
Independent school · Grades Pre-K–12
7.5 students per teacher
Sun Valley, ID
B+Overall grade397 students8 students per teacher
#13 Private Schools with the Smallest Classes in Idaho
Canyon Christian School
Mennonite school · Grades 1–8
7.8 students per teacher
Hazelton, ID
A-Overall grade42 students8 students per teacher
#14 Private Schools with the Smallest Classes in Idaho
House of the Lord Christian Academy
Christian school (nondenominational) · Grades Pre-K–12
8.4 students per teacher
Oldtown, ID
BOverall grade130 students8 students per teacher
#15 Private Schools with the Smallest Classes in Idaho
Calvary Christian Academy
Christian school (nondenominational) · Grades Pre-K–12
8.4 students per teacher
Emmett, ID
A-Overall grade123 students8 students per teacher
#16 Private Schools with the Smallest Classes in Idaho
Sandpoint Waldorf School
Independent school · Grades Pre-K–8
8.9 students per teacher
Sandpoint, ID
BOverall grade152 students9 students per teacher
#17 Private Schools with the Smallest Classes in Idaho
St. Mary's Parish School
Parish school · Grades Pre-K–8
8.9 students per teacher
Moscow, ID
AOverall grade84 students9 students per teacher
#18 Private Schools with the Smallest Classes in Idaho
Grace Lutheran School
Lutheran (Missouri Synod) school · Grades Pre-K–12
9.2 students per teacher
Pocatello, ID
A+Overall grade430 students9 students per teacher
#19 Private Schools with the Smallest Classes in Idaho
Gem State Adventist Academy
Seventh-day Adventist school · Grades 9–12
9.9 students per teacher
Caldwell, ID
B+Overall grade78 students10 students per teacher
#20 Private Schools with the Smallest Classes in Idaho
Classical Christian Academy
Christian school (nondenominational) · Grades Pre-K–12
10 students per teacher
Rathdrum, ID
A-Overall grade212 students10 students per teacher
#21 Private Schools with the Smallest Classes in Idaho
The Learning Academy of Teton Valley
Independent school · Grades Pre-K–8
10 students per teacher
Driggs, ID
B+Overall grade43 students10 students per teacher
#22 Private Schools with the Smallest Classes in Idaho
Cornerstone Christian School
Christian school (nondenominational) · Grades K–8
10.1 students per teacher
Lewiston, ID
B+Overall grade107 students10 students per teacher
#23 Private Schools with the Smallest Classes in Idaho
Montessori Academy
Montessori school · Grades Pre-K–6
10.3 students per teacher
Eagle, ID
B+Overall grade62 students10 students per teacher
#24 Private Schools with the Smallest Classes in Idaho
Snake River Montessori School
Montessori school · Grades Pre-K–6
10.3 students per teacher
Ammon, ID
B+Overall grade62 students10 students per teacher
From official public records, updated October 2026.