| Academy of Information, Technology & Engineering* | J.M. Wright Technical High School |
| American School of Paris | John Jay High School |
| Berkshire School* | Kildonan School |
| Blair Academy* | Kimball Union Academy |
| Blind Brook High School | King School* |
| Brighton College UK | Lawrenceville School |
| Brunswick School | Loomis Chaffee School |
| Byram Hills High School | Marymount School of New York |
| Choate Rosemary Hall* | The Masters School* |
| Colégio Visconde de Porto Seguro | Mercersburg Academy |
| Columbus Academy | Middlesex School |
| Eastside Preparatory School | Milton Academy |
| Emma Willard School | New Fairfield High School |
| The Ethel Walker School | Northfield Mount Hermon School |
| Fairfield College Preparatory School* | Northwood School |
| Fiorello H. LaGuardia High School of Music & Art and Performing Arts | Openbaar Lyceum Zeist |
| Fox Lane High School | Oscar Romero College Belgium |
| Greens Farms Academy* | Peddie School |
| Greenwich Academy* | Phillips Academy Andover* |
| Greenwich Country Day School* | Phillips Exeter Academy |
| Greenwich High School* | Pomfret School |
| The Gunnery | Port Chester High School |
| Hackley School* | Rye Country Day School* |
| The Harvey School* | Rye High School |
| Het Amsterdams Lyceum | Sacred Heart Greenwich* |
| The Hewitt School | Salisbury School |
| Hopkins School* | St. Luke’s School* |
| International School of Curitiba | Westhill High School |
| International School of Krakow | The Windward School |
| * Indicates Multiple Matriculations |
Brunswick School
Brighton College UK
Eastside Preparatory School
Greenwich Academy
Greenwich Country Day School
Greenwich High School
King School
The Masters School
Rye Country Day School
