Founding
Schools

The Blake School / Minneapolis, MN
The Buckley School  /  Sherman Oaks, CA
Catlin Gabel School  /  Portland, OR
Choate Rosemary Hall / Wallingford, CT
Hawken School  /  Gates Mills, OH
Indian Springs School / Indian Springs, AL
The Island School  /  Eleuthera, Bahamas
Latin School of Chicago / Chicago, IL
Marin Academy / San Rafael, CA


Mounds Park Academy / Saint Paul, MN
The Nueva School
/ San Mateo, CA
Punahou School / Honolulu, HI
Riverdale Country School  /  Bronx, NY
Sage Hill School  /  Newport Coast, CA
San Francisco University High School  /  San Francisco, CA
The Spence School  /  New York, NY
Tilton School  /  Tilton, NH
Wildwood School / Los Angeles, CA

Member
Schools

All Saints’ Episcopal School / Fort Worth, TX
Allen Academy / Bryan, TX
The Altamont SchoolBirmingham, AL
American International School Riyadh / Riyadh, Saudia Arabia
American International School Chennai
  / Chennai, India
American School of Bombay / Bombay, India
American School of Dubai
/ Dubai, United Arab Emirates
Asheville School
/ Asheville, NC
The Athenian School
  /  Danville, CA
The Bay School of San Francisco  /  San Francisco CA
Bentley School / Oakland, CA
The Berkeley Carroll School / Brooklyn, NY
The Branson School  /  Ross, CA
Brooks School / North Andover, MA
Brookstone School / Columbus, GA
Brunswick School / Greenwich, CT
The Bush School  /  Seattle, WA
Campbell Hall / North Hollywood, CA
Cannon School  /  Concord, NC
Carrollwood Day School / Tampa, FL
Cary Academy / Cary, NC
Cascades Academy  /  Bend, OR
Castilleja School / Palo Alto, CA
Chadwick School  /  Palos Verdes Peninsula, CA
Chadwick International  /  Incheon, South Korea
Chapel Hill-Chauncy Hall School  / Waltham, MA
The Chapin School / New York, NY
Charles Wright Academy / Tacoma, WA
Chatham Hall / Chatham, VA
Christchurch School / Christchurch, VA
Christian Brothers College High School / St. Louis, MO
Colegio Bolivar / Cali, Colombia
The College Preparatory School  /  Oakland, CA
Colorado Academy  /  Denver, CO
Columbus School for Girls  /  Columbus, OH
/ Shanghai, China
Cranbrook Schools  /  Bloomfield Hills, MI
Crystal Springs Uplands School  /  Hillsborough, CA
The Dalton School / New York, NY
Delphian School / Sheridan, OR
Drew School / San Francisco, CA
Dunn School / Los Olivos, CA
Edmund Burke School / Washington, DC
Ensworth School / Nashville, TN
Episcopal High School / Alexandria, VA
Flintridge Preparatory School / La Cañada Flintridge, CA
Forsyth Country Day School / Lewisville, NC
The Galloway School / Atlanta, GA
Gann Academy / Waltham, MA
The Geneva School / Winter Park, FL
Gilman School / Baltimore, MD
Gimnasio La Montaña / Bogotá, Colombia
Global Online Academy / Seattle, WA
Graded – The American School of Sao Paulo / Sao Paulo, Brazil
Grand River Academy / Austinburg, OH
The Grauer School / Encintas, CA
Greens Farms Academy  /  Westport, CT
Greenwood College School / Toronto, Canada
The Harbour School / Kennedy Town, Hong Kong
Harpeth Hall / Nashville, TN
Head-Royce School  /  Oakland, CA
The Hewitt School / New York, NY
The Hill School / Pottstown, PA
The Hockaday School / Dallas, TX
Holderness School  /  Plymouth, NH
Holton-Arms School / Bethesda, MD
The Independent School of Winchester, Inc. / Winchester, VA
Island Pacific Academy / Kapolei, HI
Island School / Lihue, HI
Journeys School of Teton Science Schools / Jackson, WY
Kamehameha School Maui / Pukalani, HI
Kent Place School / Summit, NJ
Khan Lab School / Mountain View, CA
King School / Stamford, CT

King’s Academy / Madaba-Manja, Jordan
Laguna Blanca School
/ Santa Barbara, CA
Lake Forest Academy
/
Lake Forest, IL
Lakeside School
 / Seattle, WA
Laurel School
 / Shaker Heights, OH
Lawrence School
 / Sagamore Hills, OH
LEAF Academy / Bratislava, Slovakia
Lincoln School Nepal
/ Kathmandu, Nepal
Little Red School House and Elisabeth Irwin High School / New York, NY
The Lovett School
/ Atlanta, GA
Malvern Preparatory School
Malvern, PA
Maumee Valley Country Day School / Toledo, OH
The Masters School
 / Dobbs Ferry, NY
Menlo School
/ Atherton, CA
The Miami Valley School
/ Dayton, OH
Mid-Pacific Institute
/
Honolulu, HI
Midland School 
/ Los Olivos, CA
Milton Academy / 
Milton, MA
Miss Porter’s School
/ Farmington, CT
Mount Vernon Presbyterian School / Atlanta, GA
Nansemond-Suffolk Academy / Suffolk, VA
The New Community School / Richmond, VA
Newton Country Day School of the Sacred Heart  / Newton, MA
NGL Academy / Santa Rosa, CA
NGL Academy / Bellevue, NE
Noble and Greenough School / Dedham, MA
North Shore Country Day School / Winnetka, IL
Northfield Mount Hermon School / Mount Herman, MA
The Northwest School / Seattle, WA
The Ocean School / Los Angeles, CA
One Schoolhouse / Bethesda, MD
Oregon Episcopal School / Portland, OR
Oxford Academy / Westbrook, CT
Parish Episcopal School / Dallas, TX
Park Tudor School / Indianapolis, IN
Phillips Academy / Andover, MA
Phillips Exeter Academy / Exeter, NH
Phoenix Country Day School / Paradise Valley, AZ
Pingree School / Hamilton, MA
Pius XI High School / Milwaukee, WI
Polytechnic School / Pasadena, CA
Pomfret School / Pomfret Center, CT
Portledge School / Locust Valley, NY
The Principia / St. Louis, MO
Putney School / Putney, VT
Rowland Hall / Salt Lake City, UT
Ransom Everglades School / Coconut Grove, FL
Rutgers Preparatory School / Somerset, NJ
Sacred Heart Preparatory Atherton / Atherton, CA
San Domenico School / San Anselmo, CA
Seattle Waldorf School / Seattle, WA
Singapore American School / Singapore
St. Francis Episcopal School / Houston, TX
St. George’s Independent School / Memphis, TN
St. John’s School / Houston, TX
St. Luke’s School / New Canaan, CT
The Stone Independent School / Lancaster, PA
Stuart Hall School / Staunton, VA
The Thacher School / Ojai, CA
Thaden School / Bentonville, AR
Think Global School / New York, NY
University High School of Indiana / Carmel, IN
University Liggett School / Grosse Pointe Woods, WI
University Preparatory Academy / Seattle, WA
University School of Nashville / Nashville, TN
Urban School of San Francisco / San Francisco, CA
Verso International School / Bangkok, Thailand
Watershed School / Boulder, CO
Westridge School / Pasadena, CA
Westtown School / West Chester, PA
Winchester Thurston School / Pittsburgh, PA
Windward School / Los Angeles, CA
Winsor School / Boston, MA
Woodlawn School / Mooresville, NC
Wooster School / Danbury, CT
Woodside Priory School / Portola Valley, CA