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| School | City | State | Grade Range |
|---|---|---|---|
| Altamont School | Birmingham | Alabama | Middle/Upper |
| Ashley Hall | Charleston | South Carolina | PK/K/1-12 |
| Athenian School | San Francisco | California | Middle/Upper |
| Belmont Hill School | Belmont | Massachusetts | Middle/Upper |
| Berkeley Preparatory School | Tampa | Florida | PK/K/1-12 |
| Berwick Academy | South Berwick | Maine | PK/K/1-12 |
| Blake School | Hopkins | Minnesota | PK/K/1-12 |
| Branson School | Ross | California | Middle/Upper |
| Breck School | Golden Valley | Minnesota | PK/K/1-12 |
| Brentwood School | Los Angeles | California | PK/K/1-12 |
| Brooklyn Friends School | Brooklyn | New York | PK/K/1-12 |
| Buckingham Browne & Nichols School | Cambridge | Massachusetts | PK/K/1-12 |
| Buckley School | Sherman Oaks | California | PK/K/1-12 |
| Cape Henry Collegiate | Virginia Beach | Virginia | PK/K/1-12 |
| Carolina Day School | Asheville | North Carolina | PK/K/1-12 |
| Cary Academy | Cary | North Carolina | Middle/Upper |
| Casady School | Oklahoma | Oklahoma | PK/K/1-12 |
| Castilleja School | Palo Alto | California | Middle/Upper |
| Catherine Cook School | Chicago | Illinois | Elementary |
| Catlin Gabel School | Portland | Oregon | PK/K/1-12 |
| Chadwick School | Palos Verdes Peninsula | California | PK/K/1-12 |
| Charlotte Country Day School | Charlotte | North Carolina | PK/K/1-12 |
| Charlotte Latin School | Charlotte | North Carolina | PK/K/1-12 |
| Children's Day School | San Francisco | California | Elementary |
| Christ Church Episcopal School | Greenville | South Carolina | PK/K/1-12 |
| Cincinnati Country Day School | Cincinnati | Ohio | PK/K/1-12 |
| College Preparatory School | Oakland | California | Middle/Upper |
| Collegiate School | Richmond | Virginia | PK/K/1-12 |
| Colorado Academy | Denver | Colorado | PK/K/1-12 |
| Cranbrook Schools | Bloomfield Hills | Michigan | PK/K/1-12 |
| Derryfield School | Manchester | New Hampshire | Middle/Upper |
| Detroit Country Day School | Beverly Hills | Michigan | PK/K/1-12 |
| Duke School | Durham | North Carolina | Elementary |
| Durham Academy | Durham | North Carolina | PK/K/1-12 |
| Dwight-Englewood School | Englewood | New Jersey | PK/K/1-12 |
| Ensworth School | Nashville | Tennessee | PK/K/1-12 |
| Episcopal Academy | Newtown Square | Pennsylvania | PK/K/1-12 |
| Evergreen School | Shoreline | Washington | Elementary |
| Flintridge School | La Canada | California | Middle/Upper |
| Fort Worth Country Day School | Fort Worth | Texas | PK/K/1-12 |
| Francis Parker School (CA) | San Diego | California | PK/K/1-12 |
| Francis W. Parker School (IL) | Chicago | Illinois | PK/K/1-12 |
| Friends Academy | Locust Valley | New York | PK/K/1-12 |
| Georgetown Day School | Washington | District of Columbia | PK/K/1-12 |
| Germantown Academy | Fort Washington | Pennsylvania | PK/K/1-12 |
| Gilman School | Baltimore | Maryland | PK/K/1-12 |
| Girls Preparatory School | Chattanooga | Tennessee | Middle/Upper |
| Graland Country Day School | Denver | Colorado | Elementary |
| Greenhill School | Addison | Texas | PK/K/1-12 |
| Greenhills School | Ann Arbor | Michigan | Middle/Upper |
| Greens Farms Academy | Greens Farms | Connecticut | PK/K/1-12 |
| Greenwich Academy | Greenwich | Connecticut | PK/K/1-12 |
| Greenwich Country Day School | Greenwich | Connecticut | PK/K/1-12 |
| Gulliver Preparatory School | Miami | Florida | PK/K/1-12 |
| Harding Academy | Nashville | Tennessee | Elementary |
| Harley School | Rochester | New York | PK/K/1-12 |
| Harpeth Hall | Nashville | Tennessee | Middle/Upper |
| Hawken School | Gates Mills | Ohio | PK/K/1-12 |
| Head-Royce School | Oakland | California | PK/K/1-12 |
| Hillbrook School | Los Gatos | California | Elementary |
| Hockaday School | Dallas | Texas | PK/K/1-12 |
| Holland Hall | Tulsa | Oklahoma | PK/K/1-12 |
| Holton Arms School | Bethesda | Maryland | Middle/Upper |
| Hopkins School | New Haven | Connecticut | Middle/Upper |
| International School of Denver | Denver | Colorado | Elementary |
| Isidore Newman School | New Orleans | Louisiana | PK/K/1-12 |
| John Burroughs School | St. Louis | Missouri | Middle/Upper |
| John Cooper School | The Woodlands | Texas | PK/K/1-12 |
| Kamehameha Schools Hawai'i | Kea'au | Hawaii | PK/K/1-12 |
| Kent Denver School | Denver | Colorado | Middle/Upper |
| Kent Place School | Summit | New Jersey | PK/K/1-12 |
| Kentucky Country Day School | Louisville | Kentucky | PK/K/1-12 |
| Lake Forest Country Day School | Lake Forest | Illinois | Elementary |
| Lancaster Country Day School | Lancaster | Pennsylvania | PK/K/1-12 |
| Langley School | McLean | Virginia | Elementary |
| Latin School of Chicago | Chicago | Illinois | PK/K/1-12 |
| Laurel School | Shaker Heights | Ohio | PK/K/1-12 |
| Lexington School | Lexington | Kentucky | Elementary |
| Lovett School | Atlanta | Georgia | PK/K/1-12 |
| Marin Country Day School | Corte Madera | California | Elementary |
| Marist School | Atlanta | Georgia | Middle/Upper |
| Marlborough School | Los Angeles | California | Middle/Upper |
| Mary Institute & St. Louis Country Day School | St. Louis | Missouri | PK/K/1-12 |
| McDonogh School | Owings Mills | Maryland | PK/K/1-12 |
| McGillis School | Salt Lake City | Utah | Elementary |
| Metairie Park Country Day School | Metairie | Louisiana | PK/K/1-12 |
| Milton Hershey School | Hershey | Pennsylvania | PK/K/1-12 |
| Moorestown Friends School | Moorestown | New Jersey | PK/K/1-12 |
| Moses Brown School | Providence | Rhode Island | PK/K/1-12 |
| Mounds Park Academy | St. Paul | Minnesota | PK/K/1-12 |
| National Cathedral School | Washington | District of Columbia | Middle/Upper |
| New Canaan Country School | New Canaan | Connecticut | Elementary |
| Newark Academy | Livingston | New Jersey | Middle/Upper |
| Nichols School | Buffalo | New York | Middle/Upper |
| Noble and Greenough School | Dedham | Massachusetts | Middle/Upper |
| Norfolk Academy | Norfolk | Virginia | PK/K/1-12 |
| North Shore Country Day School | Winnetka | Illinois | PK/K/1-12 |
| Norwood School | Bethesda | Maryland | Elementary |
| Nueva School | Hillsborough | California | PK/K/1-12 |
| Oregon Episcopal School | Portland | Oregon | PK/K/1-12 |
| Out-of-Door Academy | Sarasota | Florida | PK/K/1-12 |
| Pace Academy | Atlanta | Georgia | PK/K/1-12 |
| Pacific Ridge School | Carlsbad | California | Middle/Upper |
| Palm Beach Day Academy | Palm Beach | Florida | Elementary |
| Parish Episcopal School | Dallas | Texas | PK/K/1-12 |
| Park School | Brookline | Massachusetts | Elementary |
| Park Tudor School | Indianapolis | Indiana | PK/K/1-12 |
| Pembroke Hill School | Kansas City | Missouri | PK/K/1-12 |
| Pike School | Andover | Massachusetts | Elementary |
| Pine Crest School | Fort Lauderdale | Florida | PK/K/1-12 |
| Pingree School | South Hamilton | Massachusetts | Middle/Upper |
| Pingry School | Basking Ridge | New Jersey | PK/K/1-12 |
| Polytechnic School | Pasadena | California | PK/K/1-12 |
| Porter-Gaud School | Charleston | South Carolina | PK/K/1-12 |
| Prairie School | Wind Point | Wisconson | PK/K/1-12 |
| Princeton Day School | Princeton | New Jersey | PK/K/1-12 |
| Providence Day School | Charlotte | North Carolina | PK/K/1-12 |
| Punahou School | Honolulu | Hawaii | PK/K/1-12 |
| Randolph School | Huntsville | Alabama | PK/K/1-12 |
| Ransom Everglades School | Coconut Grove | Florida | Middle/Upper |
| Ravenscroft School | Raleigh | North Carolina | PK/K/1-12 |
| Riverdale Country School | Bronx | New York | PK/K/1-12 |
| Rowland Hall | Salt Lake City | Utah | PK/K/1-12 |
| Roxbury Latin School | West Roxbury | Massachusetts | Middle/Upper |
| Rutgers Preparatory School | Somerset | New Jersey | PK/K/1-12 |
| Rye Country Day School | Rye | New York | PK/K/1-12 |
| Sage Hill School | Newport Coast | California | Middle/Upper |
| San Francisco Day School | San Francisco | California | Elementary |
| San Francisco University High School | San Francisco | California | Middle/Upper |
| Seattle Academy of Arts and Sciences | Seattle | Washington | Middle/Upper |
| Seven Hill School | Cincinnati | Ohio | PK/K/1-12 |
| Sewickley Academy | Sewickley | Pennsylvania | PK/K/1-12 |
| Shady Hill School | Cambridge | Massachusetts | Elementary |
| Shore Country Day School | Beverly | Massachusetts | Elementary |
| St. Andrew's Episcopal School | Ridgeland | Mississippi | PK/K/1-12 |
| St. Anne's Episcopal School | Denver | Colorado | Elementary |
| St. Christopher's School | Richmond | Virginia | PK/K/1-12 |
| St. George's Independent School | Collierville | Tennessee | PK/K/1-12 |
| St. John's Episcopal School | Dallas | Texas | Elementary |
| St. John's School | Houston | Texas | PK/K/1-12 |
| St. Luke's School | New Canaan | Connecticut | Middle/Upper |
| St. Margaret's Episcopal School | San Juan Capistrano | California | PK/K/1-12 |
| St. Martin's Episcopal School | Atlanta | Georgia | Elementary |
| St. Paul Academy and Summit School | St. Paul | Minnesota | PK/K/1-12 |
| St. Stephen's and St. Agnes School | Alexandria | Virginia | PK/K/1-12 |
| Summit Country Day School | Cincinnati | Ohio | PK/K/1-12 |
| Summit School | Winston-Salem | North Carolina | Elementary |
| Tampa Preparatory School | Tampa | Florida | Middle/Upper |
| Tatnall School | Wilmington | Delaware | PK/K/1-12 |
| The Bolles School | Jacksonville | Florida | PK/K/1-12 |
| The Bush School | Seattle | Washington | PK/K/1-12 |
| The Children's School | Atlanta | Georgia | Elementary |
| The Columbus Academy | Gahanna | Ohio | PK/K/1-12 |
| The Potomac School | McLean | Virginia | PK/K/1-12 |
| The St. Paul's Schools | Brooklandville | Maryland | PK/K/1-12 |
| Tower Hill School | Wilmington | Delaware | PK/K/1-12 |
| Trinity Episcopal School | Charlotte | North Carolina | Elementary |
| Trinity School of Durham and Chapel Hill | Durham | North Carolina | PK/K/1-12 |
| Trinity Valley School | Fort Worth | Texas | PK/K/1-12 |
| University Preparatory Academy | Seattle | Washington | Middle/Upper |
| University School of Milwaukee | Milwaukee | Wisconson | PK/K/1-12 |
| University School of Nashville | Nashville | Tennessee | PK/K/1-12 |
| Viewpoint School | Calabasas | California | PK/K/1-12 |
| Waterford School | Sandy | Utah | PK/K/1-12 |
| Waynflete School | Portland | Maine | PK/K/1-12 |
| The Westminster Schools | Atlanta | Georgia | PK/K/1-12 |
| Wheeler School | Providence | Rhode Island | PK/K/1-12 |
| Wildwood School | Los Angeles | California | PK/K/1-12 |
| William Penn Charter School | Philadelphia | Pennsylvania | PK/K/1-12 |
| Wilmington Friends School | Wilmington | Delaware | PK/K/1-12 |
| Winchester Thurston School | Pittsburgh | Pennsylvania | PK/K/1-12 |
| Winsor School | Boston | Massachusetts | Middle/Upper |
| Woodward Academy | College Park | Georgia | PK/K/1-12 |