Academy of Information Technology & Engineering (AITE)
The Benjamin School
Greenwich Academy
Greenwich Country Day School
Hackley School
Harrison High School (International Baccalaureate World School)
Hopkins School
King School
The Masters School
The Peddie School
Sacred Heart Greenwich
Westminster School
| Academy of Information, Technology & Engineering* | J.M. Wright Technical High School |
| American School of Paris | John Jay High School |
| The Benjamin School | Kildonan School |
| Berkshire School* | Kimball Union Academy |
| Blair Academy* | King School* |
| Blind Brook High School | Laurel Springs 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* | The 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 |
| Harison High School (International Baccalaureate World School) | Westminster |
| International School of Krakow | The Windward School |
| * Indicates Multiple Matriculations |
