District of Columbia
Aidan Montessori School	National Child Research Center
Beauvoir, the National Cathedral Elementary School	National Presbyterian School
Bishop John T. Walker School for Boys	Parkmont School
Capitol Hill Day School	The River School
Edmund Burke School	Sheridan School
The Field School	Sidwell Friends School
Georgetown Day School	St. Albans School
Georgetown Visitation Preparatory Day School	St. Anselm's Abbey School
Gonzaga College High School	St. Columba's Nursery School
Milton Gottesman Jewish Primary School of the Nation’s Capital	St. John's College High School
The Lab School of Washington	St. Patrick's Episcopal Day School
Little Folks School	The Washington School for Girls
Lowell School	Washington International School
Maret School	Washington Jesuit Academy
National Cathedral School
Maryland
The Academy of the Holy Cross	The Harbor School
Alef Bet Montessori School	The Heights School
Barrie School	Holton-Arms School
Bishop McNamara High School	Landon School
Bullis School	Mater Dei School
Butler Montessori	McLean School
Charles E. Smith Jewish Day School	The Nora School
Concord Hill School	Norwood School
Connelly School of the Holy Child	The Primary Day School
The Diener School	Sandy Spring Friends School
Evergreen School	Sidwell Friends (Lower) School
Friends Community School	St. Andrew's Episcopal School
Georgetown Preparatory School	Stone Ridge School of the Sacred Heart
German International School Washington, D.C.	The Tidewater School
Grace Episcopal Day School	The Woods Academy
Green Acres School	Washington Episcopal School
	Washington Waldorf School
Virginia
Browne Academy	The Hill School
Burgundy Farm Country Day School	The Langley School
Commonwealth Academy	Loudoun Country Day School
Congressional School	The Madeira School
Episcopal High School	Oakwood School
Flint Hill School	The Potomac School
Foxcroft School	St. Stephen's and St. Agnes School
Grace Episcopal School	Westminster School
Green Hedges School