Founding year: 1950
Address: Bishop McGuinness Catholic High School, 801 NW 50th St, Oklahoma City,, Oklahoma, 73118, United States
Founding year: 1950
Address: Riviera Schools, 9775 SW 87th Ave, Miami,, Florida, 33176, United States
Founding year: 1949
Address: Monterey Bay Academy (MBA), 783 San Andreas Road La Selva Beach, , California, 95076, United States
Founding year: 1949
Address: St. Stephen's Episcopal School, 6500 St. Stephen's Dr., Austin, Texas, 78746, United States
Founding year: 1949
Address: Notre Dame Academy, 4635 River Green Pkwy, Duluth, Alabama, 90064, United States
Founding year: 1949
Address: Highland View Academy, 10100 Academy Dr Hagerstown,, Maryland, 21740-1800, United States
Founding year: 1949
Address: Hawai'i Preparatory Academy, 65-1692 Kohala Mountain Road Kamuela,, Hawaii, 96743, United States
Founding year: 1948
Address: Milton Academy, 170 Centre Street, Milton, Massachusetts, 02186, United States
Founding year: 1948
Address: St. Francis School, 233 W. Broadway, Louisville, KY, Alabama, 40202, United States
Founding year: 1948
Address: Newbury Park Adventist Academy (NPAA), 180 Academy Dr, Newbury Park, Alabama, 91320, United States
Founding year: 1948
Address: Hampshire Country School, 28 Patey Cir, Rindge, Alabama, 03461, United States
Founding year: 1948
Address: Keystone School, 119 E. Craig Place, San Antonio, , Texas, 78212, United States
Founding year: 1948
Address: Rowland Hall, 720 South Guardsman Way, Salt Lake City,, Connecticut, 84108, United States
Founding year: 1947
Address: United Nations International School - Manhattan Campus, 24-50 FDR Drive NY, New York, 10010-4046, United States
Founding year: 1947
Address: St. Andrew's Episcopal School, 370 Old Agency Road Ridgeland, Mississippi, Alabama, 39157, United States
Founding year: 1947
Address: Verde Valley School, 3511 Verde Valley School Rd Sedona, Arizona, 86351-9541, United States
Founding year: 1947
Address: Walsingham Academy, 1100 Jamestown Road, Williamsburg, Virginia, 23185, United States
Founding year: 1947
Address: St. Martin's Episcopal School, 225 Green Acres Rd, Metairie, Louisiana, 70003, United States
Founding year: 1947
Address: Notre Dame High School, 13645 Riverside Dr Sherman Oaks,, California, 91423, United States
Founding year: 1947
Address: Xavier College Preparatory Roman Catholic High School, 4710 N Fifth Street Phoenix, Arizona, 85012, United States
Founding year: 1947
Address: Casady School, 9500 N Pennsylvania Ave, Oklahoma City,, Oklahoma, 73120, United States
Founding year: 1947
Address: The Waldorf School of Garden City, 225 Cambridge Ave, Garden City, New York, 11530, United States
Founding year: 1946
Address: Thomas Jefferson School, 4100 S. Lindbergh Boulevard Saint Louis, Missouri, 63127, United States
Founding year: 1946
Address: Spring Vale Christian School, 4150 S M-52 Owosso, Michigan, 48867, United States
Founding year: 1946
Address: St. Francis High School, 200 Foothill Boulevard, La Cañada, California, 91011, United States
Founding year: 1946
Address: Saint Johns School, 2401 Claremont Lane Houston, Texas, 06417, United States
Founding year: 1946
Address: Sunnydale Adventist Academy, 6818 Audrain Road 9139 Centralia, Missouri, 65240�9401, United States
Founding year: 1946
Address: Pine Forge Academy, 361 Pine Forge Rd, Pine Forge, , Pennsylvania, 19548, United States
Founding year: 1946
Address: Besant Hill School of Happy Valley, 8585 N Ojai Rd, Ojai,, California, 93023, United States
Founding year: 1946
Address: Idyllwild Arts Academy, 52500 Temecula Rd, Idyllwild, , California, 92549, United States
Founding year: 1946
Address: Jack M. Barrack Hebrew Academy, 272 S. Bryn Mawr Avenue, Bryn Mawr, , Pennsylvania, 19010, United States
Founding year: 1946
Address: The Phelps School, 583 Sugartown Road, Malvern, Pennsylvania, 19355, United States
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