#1 Private Schools with the Smallest Classes in Lower Connecticut River Valley County, CT
St. John School
Parish school · Grades Pre-K–7
3.4 students per teacher
Old Saybrook, CT
A+Overall grade55 students3 students per teacher
2026 lists
Private Schools with the Smallest Classes in Lower Connecticut River Valley County, CT
Private schools in Lower Connecticut River Valley County, CT with the fewest students per teacher (not counting preschools and special education schools). Top 6 of 6 schools.
#2 Private Schools with the Smallest Classes in Lower Connecticut River Valley County, CT
The Independent Day School
Independent school · Grades Pre-K–8
5 students per teacher
Middlefield, CT
AOverall grade89 students5 students per teacher
#3 Private Schools with the Smallest Classes in Lower Connecticut River Valley County, CT
The Children's Tree Montessori School
Montessori school · Grades Pre-K–6
6.7 students per teacher
Old Saybrook, CT
B+Overall grade40 students7 students per teacher
#4 Private Schools with the Smallest Classes in Lower Connecticut River Valley County, CT
Mercy High School
Diocesan school · Grades 9–12
12.2 students per teacher
Middletown, CT
AOverall gradeAll girls384 students12 students per teacher
#5 Private Schools with the Smallest Classes in Lower Connecticut River Valley County, CT
St. John Paul II School
Diocesan school · Grades Pre-K–8
12.4 students per teacher
Middletown, CT
AOverall grade199 students12 students per teacher
#6 Private Schools with the Smallest Classes in Lower Connecticut River Valley County, CT
Yeshiva Gedolah of Waterbury- Mesivta Durham
Religious school · Grades 9–12
23.3 students per teacher
Durham, CT
B-Overall gradeAll boys147 students23 students per teacher
From official public records, updated October 2026.