The Williston Northampton School Photo - Williston promises an academic culture that respects your ability to think for yourself and gives you the right balance of structure and freedom to make the most of it. You'll be immersed in a challenging curriculum that cultivates active, lifelong learning. And with an average class size of 13 students, your teachers are truly going to know you.

Highest Average SSAT Score

Among "Schools with 200-400 Students", view the boarding schools with the highest average SSAT score (2025).
The Secondary School Admission Test, or SSAT, is an admissions test administered to students in grades 5-11 to help determine placement into independent or private junior high and high schools.
Despite its similarities, the SSAT is not related to the SAT Reasoning test and is not administered by the College Board.
A school's average SSAT score is based on a relatively small sample of students from year to year (typically less than 100 students for a graduating class).
Average SSAT scores, then, can naturally fluctuate year to year while the quality of the overall program and strength of the student body remains consistent.
Schools in the list below are often separated by small statistical differences, which for all intents and purposes, are not meaningful in determining the overall strength of the student body between two schools.
A school's average SSAT score should not be interpreted as the minimum score needed to gain acceptance - a school's student body will have a wide range of students whose SSAT score falls above and below the school average.
% SSAT Range: 51 94 Avg. % SSAT: 68

Highest Average SSAT Score

Among Schools with 200-400 Students (out of 16 schools)

Sorted by range (alphabetically within range)
Boarding School
% SSAT
Grades
Location
Rank: #1-21.-2
St. Mark's School
St. Mark's School Photo - St. Mark's School
(Episcopal)
(7)
% SSAT: >85%
Grades: 9-12
25 Marlboro Road
Southborough, MA 01772
(508) 786-6118
Rank: #1-21.-2
The Thacher School
The Thacher School Photo - In courses designed for intellectual and creative expansion, students and teachers meet in seminar circles, studios, and laboratories to create a learning environment that is vigorous and supportive, galvanizing and nurturing.
(26)
% SSAT: >85%
Grades: 9-12
5025 Thacher Road
Ojai, CA 93023
(805) 640-3210
Rank: #3-43.-4
Ross School
Ross School Photo
% SSAT: 75%-85%
Grades: 6-12, PG  | PK-12, PG (day)
18 Goodfriend Drive
East Hampton, NY 11937
(631) 907-5400
Rank: #3-43.-4
St. Andrew's School, DE
St. Andrew's School, DE Photo - St. Andrew's seminar style discussions, which include faculty and students seated at a central round table, are heard throughout English, history and language classes.
(Episcopal)
(13)
% SSAT: 75%-85%
Grades: 9-12
350 Noxontown Road
Middletown, DE 19709
(302) 285-4231
Rank: #5-105.-10
Berkshire School
Berkshire School Photo - Founded in 1907, Berkshire School is a coed college preparatory boarding and day school for 425 ninth-12th graders and post-graduates, offering a forward-thinking curriculum and state-of-the-art facilities on a 400-acre campus in Sheffield, Mass.
(17)
% SSAT: 65%-75%
Grades: 9-12, PG
245 North Undermountain Road
Sheffield, MA 01257
(413) 229-1003
Rank: #5-105.-10
% SSAT: 65%-75%
Grades: 9-12, PG  | K-12, PG (day)
65-1692 Kohala Mountain Road
Kamuela, HI 96743
(808) 881-4321
Rank: #5-105.-10
Holderness School
Holderness School Photo - In the Holderness classroom, each student is literally in the front row, with an average class size of 12. We offer AP courses spanning multiple disciplines and encourage students to pursue an intellectual passion of their own in their twelfth-grade year as part of the Senior Thesis program.
(Episcopal)
(9)
% SSAT: 65%-75%
Grades: 9-12, PG
PO Box 1879
Plymouth, NH 03264
(603) 536-1747
Rank: #5-105.-10
Hoosac School
Hoosac School Photo - Hoosac School was founded in 1889.
(Episcopal)
% SSAT: 65%-75%
Grades: 8-12, PG
14 Pine Valley Road
Hoosick, NY 12089
(518) 686-7331
Rank: #5-105.-10
Portsmouth Abbey School
Portsmouth Abbey School Photo
(Catholic)
(5)
% SSAT: 65%-75%
Grades: 9-12
285 Cory's Lane
Portsmouth, RI 02871
(401) 643-1248
Rank: #5-105.-10
Westtown School
Westtown School Photo - Main building
(Society of Friends)
(44)
% SSAT: 65%-75%
Grades: 9-12  | PK-12 (day)
975 Westtown Rd
West Chester, PA 19382
(610) 399-7900
Rank: #11-1611.-16
Asheville School
Asheville School Photo - Asheville School is for those who dare to be extraordinary. It is a privilege to learn and live at Asheville School, a small and special enclave among ancient mountains.
(4)
% SSAT: <65%
Grades: 9-12
360 Asheville School Rd.
Asheville, NC 28806
(828) 254-6345
Rank: #11-1611.-16
Brewster Academy
Brewster Academy Photo - Welcome to Wolfeboro! Brewster's lakeside location provides students with a variety of resources on and off campus. Our outdoor facilities include six athletic fields, nine tennis courts, and a boathouse which provides storage and work areas for rowing shells and "420" racing sailboats.
(10)
% SSAT: <65%
Grades: 9-12, PG
80 Academy Drive
Wolfeboro, NH 03894
(603) 569-7200
Rank: #11-1611.-16
The MacDuffie School
The MacDuffie School Photo - Aerial view of MacDuffie's 250 acre campus
(1)
% SSAT: <65%
Grades: 6-12, PG
66 School Street
Granby, MA 01033
(413) 255-0000
Rank: #11-1611.-16
Proctor Academy
Proctor Academy Photo - A community built on authentic relationships.
(12)
% SSAT: <65%
Grades: 9-12, PG
204 Main Street - P.O. Box 500
Andover, NH 03216
(603) 735-6652
Rank: #11-1611.-16
Salisbury School
Salisbury School Photo
All-Boys
(2)
% SSAT: <65%
Grades: 9-12, PG
251 Canaan Road
Salisbury, CT 06068
(860) 435-5732
Rank: #11-1611.-16
% SSAT: <65%
Grades: 9-12, PG  | 7-12, PG (day)
19 Payson Avenue
Easthampton, MA 01027
(413) 529-3241

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