Founding year: 1902
Address: Brunswick School, 100 Maher Ave, Greenwich, Alabama, 06830, United States
Founding year: 1901
Address: Marist School, 3790 Ashford Dunwoody Rd NE, Atlanta, Alabama, 30319-1899, United States
Founding year: 1901
Address: Thornton-Donovan School, 100 Overlook Circle New Rochelle, New York, 10804, United States
Founding year: 1901
Address: Middlesex School, 1400 Lowell Road Concord, , Massachusetts, 01742, United States
Founding year: 1901
Address: Francis W. Parker School, 330 West Webster Avenue, Chicago, , Illinois, 60614, United States
Founding year: 1901
Address: Holton-Arms School, 7303 River Road, Bethesda, , Maryland, 20817, United States
Founding year: 1901
Address: Hillside School, 404 Robin Hill Street Marlborough,, Massachusetts, 01752, United States
Founding year: 1901
Address: The Chapin School, 100 East End Avenue, New York, New York, 10028, United States
Founding year: 1900
Address: Delasalle High School, 1 De La Salle Dr, Minneapolis,, Minnesota, 55401, United States
Founding year: 1900
Address: National Cathedral School, 3612 Woodley Road NW Washington,, Washington, 20016, United States
Founding year: 1900
Address: Woodward Academy, 1662 West Rugby Avenue College Park, Atlanta, Georgia, 30337, United States
Founding year: 1900
Address: Gill St. Bernard's School, 25 St Bernards Rd, Gladstone,, New Jersey, 07934, United States
Founding year: 1900
Address: St. Thomas High School, 4500 Memorial Dr. Houston, Texas, 77007, United States
Founding year: 1900
Address: Ozark Adventist Academy, 20997 Dawn Hill East Rd. Gentry, , Arkansas, 72734, United States
Founding year: 1900
Address: Asheville School, 360 Asheville School Road Asheville, NC, North Carolina, 28806, United States
Founding year: 1900
Address: Bancroft School, 110 Shore Drive Worcester, MA, Massachusetts, 01605, United States
Founding year: 1900
Address: Harvard-Westlake School, 700 North Faring Road Los Angeles, , California, 90077, United States
Founding year: 1900
Address: Rumsey Hall School, 201 Romford Road Washington, Connecticut, 06794, United States
Founding year: 1900
Address: Christ School, 500 Christ School Rd, Arden,, South Carolina, 28704, United States
Founding year: 1900
Address: Loyola School, 980 Park Avenue New York,, New York, 10028, United States
Founding year: 1900
Address: Christian Brothers Academy, 850 Newman Springs Rd, Lincroft, Alabama, 13214, United States
Founding year: 1899
Address: Massanutten Military Academy, 614 S Main St, Woodstock, Alabama, 22664, United States
Founding year: 1899
Address: Wisconsin Academy, N2355 DuBorg Rd, Columbus, Wisconsin, 53925, United States
Founding year: 1899
Address: Hackley School, 293 Benedict Avenue Tarrytown, , New York, 10591, United States
Founding year: 1899
Address: Oneida Baptist Institute, 11 Mulberry St Oneida, Kentucky, 40972-0067, United States
Founding year: 1899
Address: Jesuit High School, 1200 Jacob Ln, Carmichael, Alabama, 33614, United States
Founding year: 1898
Address: Southern Preparatory Academy, 174 Ward Circle Camp Hill, Alabama, 36850, United States
Founding year: 1898
Address: Miss Hall's School, 492 Holmes Road Pittsfield, , Massachusetts, 01201, United States
Founding year: 1898
Address: Fork Union Military Academy, 4744 James Madison Hwy, Fork Union,, Virginia, 23055, United States
Founding year: 1898
Address: Waynflete, 360 Spring St, Portland, Maine, 04102, United States
Founding year: 1898
Address: Sacred Heart Schools Atherton, 150 Valparaiso Ave Atherton, California, 94027, United States
Founding year: 1898
Address: Columbus School for Girls, 65 S Drexel Ave, Columbus,, Ohio, 43209, United States