- The Abbey School
- The Agnes Irwin School
- All Saints’ Episcopal Day School
- The Aquinas Institute of Rochester
- Athol Murray College of Notre Dame
- Ballarat and Queen’s Anglican Grammar School
- Battle Ground Academy
- Belmont Hill School
- The Bishop’s School
- Blue Ridge School
- Bolles School
- The Branson School
- Brighton Grammar School
- Brisbane Girls Grammar School
- The Browning School
- Brunswick School
- Burgundy Farm Country Day School
- Campbell College
- Carey Baptist Grammar School
- Cathedral School for Boys
- Catlin Gabel School
- Caulfield Grammar School
- Chatham Hall School
- Chelsea Day School
- Chinese American International School
- Chinese International School
- Christ Church Episcopal School
- The Churchill School & Center
- City of London School
- The College Preparatory School
- Crescent School
- Crossroads School (CA)
- Curtis School
- The Cushman School
- Dedham Country Day School
- Delbarton School
- The Episcopal Academy
- Episcopal High School (TX)
- The Fessenden School
- Francis Parker School
- The Friends’ School
- The Galloway School
- Geelong Grammar School
- Germantown Academy
- Grymes Memorial School
- Hackley School
- Haileybury
- Hale School
- The Hamlin School
- Hanahau’oli School
- Harbor Day School
- The Harley School
- Harpeth Hall School
- Harvard-Westlake School
- Havergal College
- Head-Royce School
- The Heights School (MD)
- Heritage Hall School
- The Hill School (PA)
- Holy Trinity School
- The Hotchkiss School
- Indian Creek School
- International School of Geneva
- Kent Place School
- Kent School
- Kents Hill
- Kincoppal-Rose Bay, School of the Sacred Heart
- Knox Grammar School
- Korowa Anglican Girls’ School
- La Jolla Country Day School
- Lakefield College School
- Landmark School
- Lauriston Girls’ School
- Lausanne Collegiate School
- Legacy Christian Academy
- Lick-Wilmerding High School
- Louisville Collegiate School
- The Lovett School
- Loyola High School
- Malvern Preparatory School
- Marin Academy
- The Marvelwood School
- Mayfield Junior School
- McDonogh School
- Melbourne Grammar School
- Methodist Ladies’ College
- Miami Country Day School
- Mid-Pacific Institute
- Millbrook School
- Moorestown Friends School
- Munich International School
- Nashoba Brooks School
- Neuchatel Junior College
- Nichols School
- Noble and Greenough School
- Northfield Mount Hermon School
- Northridge Preparatory School
- Norwood School
- Nueva School
- Palmer Trinity School
- The Park School (MA)
- Pembroke Hill School
- Phillips Exeter Academy
- The Pike School
- Poly Prep Country Day School
- Polytechnic School
- Punahou School
- Randolph Macon Academy
- Renbrook School
- The Rivers School
- Royal St. George’s College
- Ruyton Girls’ School
- The Sage School
- Saint Andrew’s School (FL)
- Saint Edward’s School
- Saint Louis Priory School
- San Francisco Day School
- Scotch College Foundation
- Scotch College, Adelaide
- Seven Hills School
- Sidwell Friends School
- Sonoma Academy
- St Aloysius’ College
- St Catherine’s School
- St Margaret’s School for Girls
- St Peter’s School
- St. Agnes Academy
- St. Andrew’s Episcopal School (MS)
- St. Andrew’s School (RI)
- St. Christopher’s School (VA)
- St. Clement’s School
- St. George’s Episcopal School, New Orleans
- St. John’s School (TX)
- St. Johns Country Day School
- St. Joseph’s College, Hunters Hill
- St. Paul’s School (NH)
- St. Stephen’s and St. Agnes School
- Tabor Academy
- The Taft School
- Tampa Preparatory School
- The Thacher School
- Town School for Boys
- Trafalgar Castle School
- Trinity Grammar School
- Trinity Grammar School, Kew
- Trinity-Pawling School
- University School (OH)
- Upper Canada College
- The Urban School of San Francisco
- Vermont Academy
- Villanova Preparatory School
- Virginia Episcopal School
- The Webb School (TN)
- The Webb Schools
- Westminster School (CT)
- The Westminster Schools
- Wilbraham & Monson Academy
- Wildwood School (CA)
- Woodberry Forest School
- Wyoming Seminary