Member Schools
 Agnes Irwin School  Rosemont PA
 Annunciation Orthodox School   Houston TX
 Bancroft Summer  Worcester MA
 Beaver Country Day School
 Chestnut Hill MA
 Breakwater Learning  Portland ME
 Browne Academy  Alexandria VA
 Burgundy Farm Country Day School  Alexandria VA
 Cambridge Montessori School  Cambridge MA
 Cape Cod Academy  Osterville MA
 Cardigan Mountain School  Canaan NH
 Casady School  Oklahoma City OK
 Chaminade College Preparatory  West Hills CA
 Chandler School  Pasadena CA
 Congressional School  Falls Church VA
 Escuela Bilingue Internacional  Oakland CA
 Fay School  Southborough MA
 Fenn School  Concord MA
 Georgetown Day School  Washington DC
 Girls Preparatory School  Chattanooga TN
 Gordon School  East Providence RI
 Green Acres School  Bethesda MD
 Greene Street Friends School  Philadelphia PA
 Gulliver Schools  Miami FL
 Harvard-Westlake School  Studio City CA
 Hawaii Preparatory School  Kamuela HI
 Holy Innocents' Episcopal School  Atlanta GA
 Idyllwild Arts  Idyllwild CA
 Lake Highland Prep  Orlando FL
 Lakeside School  Seattle WA
 Lawrence Academy  Groton MA
 Marlborough School  Los Angeles CA
 Mercersburg Academy  Mercersburg PA
 Miami Country Day School  Miami FL
 Montessori School of Durham  Durham NC
 Moorestown Friends School  Moorestown NJ
 Moses Brown School  Providence RI
 New Canaan Country School  New Canaan CT
 Nishimachi International School  Tokyo Japan
 North Shore Country Day School  Winnetka IL
 Oak Hall School  Gainesville FL
 Open Window School  Bellevue WA
 Pace Academy  Atlanta GA
 Parish Episcopal School  Dallas TX
 Peddie School  Hightstown NJ
 Pine Crest School  Fort Lauderdale FL
 Poly Prep Country Day School  Brooklyn NY
 Portledge School  Locust Valley NY
 Punahou School  Honolulu HI
 Sandy Spring Friends School  Sandy Spring MD
 Sequoyah School  Pasadena CA
 Sheridan School  Washington DC
 Sidwell Friends School  Washington DC
 Springside Chestnut Hill Academy  Philadelphia PA
 St. Andrew's Episcopal School  Austin TX
 St. Christopher's School  Richmond VA
 St. Mark's Episcopal School  Houston TX
 St. Mark's School  Southborough MA
 St. Michael's Episcopal School  Richmond VA
 St. Stephen's Episcopal  Austin TX
 Stevenson School  Pebble Beach CA
 Stone Ridge School of the Sacred Heart  Bethesda MD
 Sycamore School  Indianapolis IN
 Tabor Academy  Marion MA
 The Bolles School  Jacksonville FL
 The Hockaday School  Dallas TX
 The Lawrenceville School  Lawrenceville NJ
 The Lexington School  Lexington KY
 The Meridian School  Seattle WA
 The Montessori School of Raleigh  Raleigh NC
 The Pennington School  Pennington NJ
 The Pingry School  Basking Ridge NJ
 The Potomac School  McLean VA
 The School in Rose Valley  Rose Valley PA
 University School of Nashville  Nashville TN
 Wellington School  Columbus OH
 Westtown School  West Chester PA
 Wheeler School  Providence RI
 Wyoming Seminary  Kingston PA