| Country | State/Province | City |
| Australia | Australian Capital Territory (ACT) |
Canberra (Lyneham Primary School) |
| Australia | Queensland | Brisbane |
| Australia | Victoria | Beechworth |
| Austria | ----- | Graz |
| Belgium | ----- | Wichelen |
| Bolivia | ----- | La Paz |
| Bulgaria | ----- | Sofia (American College of Sofia) |
| Canada | Alberta | Calgary High River (Senator Riley Middle School) Medicine Hat |
| Canada | Newfoundland | Meadows |
| Canada | Ontario | Belleville Hamilton (Mohawk College) Ottawa Ridgetown Toronto |
| Canada | Quebec | Cantley Montréal Waterloo |
| Czech Republic |
----- | Brno |
| Egypt | ----- | Alexandria Cairo |
| Finland | ----- | Helsinki |
| France | ----- | Marseille |
| Germany | Baden-Württemberg |
Heidelberg |
| Germany | Bavaria | Regensburg |
| Germany | Hesse | Bad Homburg |
| Greece | ----- | Athens |
| Hungary | ----- | Budapest |
| India | Delhi | New Delhi |
| India | Gujarat | Ahmedabad |
| India | Haryana | Hisar |
| India | Karnataka | Bangalore |
| India | Kerala | Alleppey Champakulam Cochin |
| India | Maharashtra | Mumbai City Pune |
| India | Shillong | Happy Valley (Kendriya Vidyalaya School) |
| India | Tamilnadu | Sirkazhi |
| India | Telangana | Hyderabad |
| India | Uttar Pradesh | Meerut (D.N. College) |
| India | West Bengal | Calcutta Shantiniketan |
| Iran | ----- | Tehran |
| Ireland | Limerick | Limerick |
| Israel | ----- | Herzeliya |
| Italy | ----- | Duino (United World College of the Adriatic) Fermo (Istituto Tecnico Tecnologico (ITT) "Montani") Rome (St. Stephens High School) |
| Jordan | ----- | At Tafilah |
| Lebanon | ----- | Beirut (Le Lycee National - Lebanon) |
| Malaysia | ----- | Melaka |
| Mexico | Campeche | San Francisco de Campeche |
| Mexico | Tamaulipas | Reynosa |
| Nepal | ------ | Lalitpur City |
| Netherlands | North Holland | Heiloo |
| Philippines | ----- | Quezon City |
| Poland | ----- | Tczew |
| Portugal | ----- | Lisboa |
| Romania | ----- | ----- |
| Russia | ----- | Saint Petersburg (Herzen State Pedagogical University of Russia) |
| Sierra Leone | Western Area Urban District |
Freetown |
| Singapore | ----- | Singapore |
| South Africa | ----- | Johannesburg Kimberley |
| South Korea |
----- | JeonJu |
| Spain | ----- | Barcelona City Castellon Las Palmas de Gran Canaria (Universidad de Las Palmas de Gran Canaria) |
| Sweden | Danderyd | Stocksund |
| Sweden | Stockholm | Stockholm (Royal Institute of Technology) |
| Sweden | Örebro | Garphyttan Mullhyttan Örebro (University of Örebro) Risbergskaskolan Sverige Tullängen Tullängsskolan |
| Switzerland | Broye | Montet (Centre de Rencontre) |
| Taiwan | ----- | Tainan |
| Turkey | Ankara | Ankara (Hacettepe University) |
| Turkey | Antalya |
Antalya (Bil Anadolu Lisesi) |
| Turkey | Istanbul |
Istanbul |
| Turkey | Kayseri |
Kayseri |
| Turkey | Sakarya Province |
Sakarya City |
| Turkey | Trabzon |
Trabzon (Karadeniz Teknik Üniversitesi, Blacksea Technical University) |
| Ukraine | ----- | Kyiv |
| United Kingdom (England) |
Dorset | Poole |
| United Kingdom (England) |
Essex | Basildon |
| United Kingdom (England) |
Hampshire | Portsmouth |
| United Kingdom (England) |
Kent | Benenden Cranbrook West Malling |
| United Kingdom (England) |
Leicestershire | Leicester |
| United Kingdom (England) |
Middlesex | Feltham |
| United Kingdom (England) |
West Midlands | Studley (in Stratford-on-Avon in Warwickshire) |
| United Kingdom (England) |
West Yorkshire | Batley (Batley Girls High School) |
| United States | Alabama | Abbeville Birmingham Decatur (Calhoun Community College) Mobile Russellville Tuscaloosa (at Epiphany Cafe, University of Alabama) |
| United States | Arizona | Flagstaff (Northern Arizona University) Glendale (Midwestern University - Glendale) Sierra Vista Tucson |
| United States |
Arkansas | Cabot |
| United States | California | Anderson (Anderson Middle School) Armona Bakersfield Berkeley (Berkeley High School) Carmichael Chico (Parkview Elementary School) Concord (Clayton Valley Charter High School) Fremont Fresno La Jolla Lafayette Long Beach Los Angeles (Manual Arts High School) Mission Viejo (Saddleback Valley Unified School District) Novato Pasadena (California Institute of Technology, Pasadena City College) Redondo Beach San Diego San Francisco San Jose San Rafael San Ramon Santa Monica Somis Ventura |
| United States | Colorado | Colorado Springs (Rampart High School) Denver Delta (Delta High School) Dolores Fort Collins (Preston Junior High School, Bauder Elementary School) Grand Junction (Redlands Middle School, Central High School) Longmont |
| United States | Connecticut | Farmington (Farmington High School) Middletown Norwalk Trumbull Wallingford |
| United States | District of Columbia | Washington, D.C. (The Field School) |
| United States | Florida |
Jacksonville Naples, Florida (Lely High School) New Port Richey (Pasco County Schools) Orlando (University of Central Florida) Ponce de Leon Ponte Vedra Beach Spring Hill Sunrise Tallahassee (John Paul II Catholic High School) Wellington |
| United States | Georgia | Atlanta Columbus (Brookstone School, Columbus Technical College) Watkinsville |
| United States | Hawaii |
Honolulu (Kalani High School) |
| United States | Illinois | Chicago (St Benedict Preparatory School) Crest Hill Darien Elgin Elmhurst Joliet (Joliet Central High School) Morris Mundelein (Mundelein High School) Northbrook Park Ridge Plainfield Waukegan (Waukegan high school) Westchester (St. Joseph High School) Wheaton (Wheaton College) |
| United States | Indiana |
Culver (Culver Academies) Fort Wayne (Northrop High School) Highland Jasper Marion (McCulloch Junior High School) Poseyville (North Posey Sr High School) Terre Haute |
| United States | Iowa | Gaza (South O'Brien High School) Waukee (Waukee High School) |
| United States | Kansas | Colwich (St. Marks Elementary) Lenexa Shawnee Mission Wichita |
| United States |
Kentucky | Leitchfield |
| United States |
Louisiana | DeRidder |
| United States | Maine | Hebron Naples Portland Saco (Thornton Academy) |
| United States | Maryland | Baltimore Bethesda (Landon School) Silver Spring |
| United States | Massachussetts | Boston Charlton Chelmsford (Chelmsford High School) Greenfield Hatfield (Smith Academy) Melrose North Adams North Andover North Chelmsford Northborough (Algonquin Regional High School) Norton (Yelle Elementary School) Plainville Waltham |
| United States | Michigan | Ann Arbor (University of Michigan) Flint (University of Michigan at Flint) Rockford Taylor (John F. Kennedy High School) |
| United States | Minnesota | Edina Minneapolis Northfield (St. Olaf's College) Victoria |
| United States |
Mississippi |
Kosciusko |
| United States | Missouri | Chesterfield (Chesterfield Elemntary School) Corder Kansas City (MCC Penn Valley) St. Louis Sikeston Springfield (Springfield Catholic High School) |
| United States | Montana | Great Falls (Malmstrom Air Force Base) |
| United States | Nebraska | Beatrice Omaha |
| United States | Nevada | Las Vegas Reno |
| United States |
New Hampshire | Concord Hinsdale (Hinsdale High School) |
| United States | New Jersey | Bridgewater Closter Chatham (Chatham High School) Ft. Monmouth Highland Park Montville Morristown (Unity Charter School) Sewell (Washington Township High School) Somerset Turnersville |
| United States | New York | Clinton Corners Fisher's Island Ithaca (Cornell University) Manhasset Montgomery New York City North Salem Port Washington (Paul D. Schreiber High School) Ticonderoga |
| United States | North Carolina | Asheville Chapel Hill (University of North Carolina) Durham (Duke University) Rocky Point Rowland (South Robeson High School) |
| United States | Ohio | Cincinnati Columbus Dayton Kent Lordstown Loudonville (Loudonville High School) Mount Vernon (Mount Vernon High School) Norwalk Peninsula (Woodridge High School) Toledo |
| United States | Oklahoma | Bokchito Oklahoma City (Santa Fe South Pathways Middle College) |
| United States | Oregon | Lake Oswego (Lakeridge High School) |
| United States | Pennsylvania | Bedford Bethlehem (Lehigh University) Carlisle Coopersburg Downingtown (Downingtown Stem Academy) Ebensburg Emmaus Greencastle Greenville (Thiel College) Kennett Square Lewisburg (Bucknell University) Norristown Philadelphia (Drexel University) Phoenixville Pittsburgh (University of Pittsburgh) Rydal |
| United States | Rhode Island | Newport
Providence (Brown University) Tiverton (Bristol Community College) |
| United States | South Carolina | Aiken Bennettsville Dillon (Lake View High School) Donalds Spartanburg (Broome High School) |
| United States | Tennessee | Cordova Dandridge Franklin Jackson (North Side High School) Johnson City Manchester Memphis Murfreesboro Nashville |
| United States | Texas | Austin Bastrop Baytown (Sterling High School) Dallas Giddings (Giddings High School) Haltom City (Birdville Independent School District) Harlingen Houston (University of Houston) San Antonio San Marcos Waco (Baylor University) |
| United States |
Vermont | Vernon |
| United States | Virginia | Alexandria Arlington Ashburn Blacksburg (Virginia Tech) Centreville Chantilly Charlottesville (University of Virgina) Chesapeake (Stone Bridge School), Clearbrook Falls Church Ft. Eustis Gate City (Gate City High School) Gretna Harrisonburg (James Madison University, Harrisonburg High School) Henrico County Purcellville (Loudoun Valley High School) McLean Middletown (Lord Fairfax Community College) Newport News Norfolk (Old Dominion University) Oak Hill Reston Richmond (University of Richmond, Medical College of Virginia, Virginia Commonwealth University) Roanoke Stephens City Strasburg Vienna Waynesboro Williamsburg (College of William & Mary) Winchester (John Handley High School, Shenandoah University) Woodbridge |
| United States | Washington | Auburn (Muckleshoot Tribal School) Bainbridge Island (Sonoji Sakai Intermediate School) Bellingham Edmonds Issaquah (Clark Elementary) Olympia Seattle Vancouver |
| United States | West Virginia | Thacker Williamson |
| United States | Wisconsin | Armstrong Creek Green Bay (Green Bay East High School) Kenosha (Carthage College) Madison Marshall Medford (Holy Rosary Catholic School) |
| United States | Wyoming | Mountain View (Mountain View High School) |
| Vietnam | ----- | Ho Chi Minh City |
