#1 Private Schools with the Smallest Classes in Massachusetts
Wellan Montessori School
Montessori school · Grades Pre-K–8
1.9 students per teacher
Newton, MA
A+Overall grade167 students2 students per teacher
2026 lists
Private Schools with the Smallest Classes in Massachusetts
Private schools in Massachusetts with the fewest students per teacher (not counting preschools and special education schools). Top 50 of 318 schools.
#2 Private Schools with the Smallest Classes in Massachusetts
Buxton School
Independent school · Grades 9–12
2.4 students per teacher
Williamstown, MA
A+Overall grade48 students2 students per teacher
#3 Private Schools with the Smallest Classes in Massachusetts
Metrowest Jewish Day School
Jewish day school · Grades K–8
2.6 students per teacher
Framingham, MA
A+Overall grade40 students3 students per teacher
#4 Private Schools with the Smallest Classes in Massachusetts
Fusion Academy Newton
Alternative school · Grades 6–12
2.7 students per teacher
Newton, MA
A-Overall grade69 students3 students per teacher
#5 Private Schools with the Smallest Classes in Massachusetts
Riverbend School
Montessori school · Grades Pre-K–8
2.8 students per teacher
Natick, MA
A+Overall grade126 students3 students per teacher
#6 Private Schools with the Smallest Classes in Massachusetts
Corwin-Russell School at Broccoli Hall
Independent school · Grades 6–12
3.1 students per teacher
Sudbury, MA
A+Overall grade40 students3 students per teacher
#7 Private Schools with the Smallest Classes in Massachusetts
Miss Hall's School
Independent school · Grades 9–12
3.2 students per teacher
Pittsfield, MA
A+Overall gradeAll girls190 students3 students per teacher
#8 Private Schools with the Smallest Classes in Massachusetts
Adams Montessori School
Montessori school · Grades Pre-K–6
3.2 students per teacher
Quincy, MA
A+Overall grade64 students3 students per teacher
#9 Private Schools with the Smallest Classes in Massachusetts
Harborlight Montessori
Montessori school · Grades Pre-K–8
3.5 students per teacher
Beverly, MA
AOverall grade125 students4 students per teacher
#10 Private Schools with the Smallest Classes in Massachusetts
Star Academy for the Gifted and Talented
Independent school · Grades Pre-K–11
3.6 students per teacher
Watertown, MA
A-Overall grade217 students4 students per teacher
#11 Private Schools with the Smallest Classes in Massachusetts
St. Michael School
Diocesan school · Grades Pre-K–8
3.6 students per teacher
Lowell, MA
A+Overall grade148 students4 students per teacher
#12 Private Schools with the Smallest Classes in Massachusetts
Learning Project Elementary School
Independent school · Grades K–6
3.7 students per teacher
Boston, MA
A+Overall grade118 students4 students per teacher
#13 Private Schools with the Smallest Classes in Massachusetts
Touchstone Community School
Independent school · Grades Pre-K–8
3.7 students per teacher
Grafton, MA
A+Overall grade47 students4 students per teacher
#14 Private Schools with the Smallest Classes in Massachusetts
Shrewsbury Montessori School
Montessori school · Grades Pre-K–6
3.8 students per teacher
Shrewsbury, MA
B+Overall grade90 students4 students per teacher
#15 Private Schools with the Smallest Classes in Massachusetts
Commonwealth School
Independent school · Grades 9–12
3.9 students per teacher
Boston, MA
A+Overall grade154 students4 students per teacher
#16 Private Schools with the Smallest Classes in Massachusetts
Bay Farm Montessori Academy
Montessori school · Grades Pre-K–8
3.9 students per teacher
Duxbury, MA
A-Overall grade67 students4 students per teacher
#17 Private Schools with the Smallest Classes in Massachusetts
Bard Academy at Simons Rock
Independent school · Grades 9–10
3.9 students per teacher
Great Barrington, MA
AOverall grade47 students4 students per teacher
#18 Private Schools with the Smallest Classes in Massachusetts
Fay School
Independent school · Grades K–9
4 students per teacher
Southborough, MA
A+Overall grade486 students4 students per teacher
#19 Private Schools with the Smallest Classes in Massachusetts
Gateways Academy
Independent school · Grades Pre-K–11
4 students per teacher
Shrewsbury, MA
AOverall grade54 students4 students per teacher
#20 Private Schools with the Smallest Classes in Massachusetts
St. Paul's Choir School
Independent Catholic school · Grades 3–8
4 students per teacher
Cambridge, MA
A+Overall gradeAll boys40 students4 students per teacher
#21 Private Schools with the Smallest Classes in Massachusetts
St. Mark's School
Episcopal school · Grades 9–12
4.1 students per teacher
Southborough, MA
A+Overall grade377 students4 students per teacher
#22 Private Schools with the Smallest Classes in Massachusetts
Belmont Day School
Independent school · Grade 1
4.1 students per teacher
Belmont, MA
A+Overall grade334 students4 students per teacher
#23 Private Schools with the Smallest Classes in Massachusetts
Stoneleigh-Burnham School
Independent school · Grades 7–12
4.1 students per teacher
Greenfield, MA
A+Overall gradeAll girls98 students4 students per teacher
#24 Private Schools with the Smallest Classes in Massachusetts
Solomon Schechtee Day School
Jewish day school · Grades Pre-K–8
4.2 students per teacher
Newton, MA
A-Overall grade359 students4 students per teacher
From official public records, updated October 2026.