Ten Schools Admission Organization

The Ten Schools Admission Organization (TSAO) is a group of private, college-preparatory boarding schools in the Northeastern United States that cooperate in their outreach to prospective students.

Overview

TSAO was founded in 1952.^[1] Its member institutions cooperate in their outreach to prospective students, sharing resources at domestic and international admission fairs.^[2][3]

Although several TSAO schools no longer publish their endowment figures, in 2016 the TSAO contained ten of the twenty wealthiest traditional college-preparatory boarding schools in the United States, as measured by total size of endowment.^[4] Seven TSAO members are also members of the Eight Schools Association, another group of large college-preparatory boarding schools.

At times, TSAO schools adopt common policies with respect to applicants and admitted students, such as a uniform deadline to accept or reject offers of admission.^[5] The TSAO does not have a uniform policy with respect to standardized testing, and two of its member schools remain test-optional as of the 2024-25 application cycle.^[6][7]

With one exception, every TSAO member educates both boarding and day students, and offers a post-graduate year. St. Paul's School educates only boarders, and admits neither post-graduates nor incoming seniors.^[8]

Member schools

School	Location	Established	Enrollment (2021-22)	Campus type (NCES if available)	Postgraduate year Number of PG students	Standardized test required?	Source(s)
Choate Rosemary Hall (Choate)	Wallingford, CT	1890	868	Suburban	Yes (15-25)	No	[9][6]
Deerfield Academy	Deerfield, MA	1797	666	Rural	Yes	Yes	[10][11]
The Hill School	Pottstown, PA	1851	520	Suburban	Yes (14-20)	Yes	[12][13][14]
Hotchkiss School	Lakeville, CT	1891	622	Rural	Yes	Yes	[15][16][17]
Lawrenceville School	Lawrenceville, NJ	1810	818	Suburban	Yes	Yes	[18][19]
Loomis Chaffee School	Windsor, CT	1914	736	Suburban	Yes (20-25)	No	[20][21][7]
Phillips Academy (Andover)	Andover, MA	1778	1,187	Suburban	Yes (~20)	Yes	[22][23][24]
Phillips Exeter Academy (Exeter)	Exeter, NH	1781	1,064	Suburban	Yes (~24)	Yes	[25][26][27]
St. Paul's School	Concord, NH	1856	542	Town	No	Yes	[28][8][29]
Taft School	Watertown, CT	1890	601	Suburban	Yes	Yes	[30][31]

See also

• Saint Grottlesex