| Country | School |
| Angola | Habs Boys |
| Australia | Burntwood School |
| Bangladesh | Habs Girls |
| Belgium | Colegio Ayalde |
| Bhutan | St Andrew’s, Dublin |
| Bolivia (SC) | Int’l School of Helsinki |
| Bosnia | Newpark Comprehensive |
| Bulgaria | Habs Girls |
| Cambodia | Cheadle Hulme |
| Canada | Munabe School |
| Chad | High School |
| China (*SC) | St Andrew’s, Dublin |
| Colombia | High School |
| Cote d’Ivoire (SC) | St Joseph Greek French School |
| Croatia | Colegiul German Goethe Bucuresti |
| Cuba | Royal Russell School |
| Cyprus | St Andrew’s, Dublin |
| Czech Republic | Colegio Ayalde |
| Denmark | Colegiul German Goethe Bucuresti |
| DR Korea (North) | Wycombe Abbey |
| Ecuador | Habs Boys |
| Egypt | Int’l School of Helsinki |
| El Salvador | St Andrew’s, Dublin |
| Equatorial Guinea (SC) | Shrewsbury |
| Ethiopia (SC) | Cheadle Hulme |
| Finland | Gymnazium Omska, Prague |
| France (*SC) | Wycombe Abbey |
| Georgia | St Edward High |
| Germany | Terenure College |
| Ghana | Lingfield College |
| Greece | Santa Margarita Catholic High |
| Iceland | Int’l School of Helsinki |
| India | American School of Bilbao |
| Indonesia | Rathdown School |
| Iran | St Andrew’s, Dublin |
| Ireland | Frankfurt Int’l School |
| Israel | American School of Bilbao |
| Italy | St Joseph Greek French School |
| Japan | Hitachi Daiichi High School |
| Kazakhstan (SC) | John Warner |
| Kenya | Sainte Victoire Int’l School |
| Kuwait (SC) | Bishop Thomas Grant |
| Latvia | Frankfurt Int’l School |
| Luxembourg | Terenure College |
| Malaysia | Lingfield College |
| Malta | Habs Boys |
| Mexico | Santa Margarita Catholic High |
| Monaco | St Joseph Greek French School |
| Myanmar | Bishop Thomas Grant |
| Netherlands (SC) | Reigate Grammar |
| New Zealand | Cours St Charles |
| Nigeria | Wycombe Abbey |
| Norway | St Andrew’s, Dublin |
| Oman | St Joseph Greek French School |
| Pakistan | Royal Russell School |
| Peru (SC) | Queen’s Gate School |
| Philippines | Frankfurt Int’l School |
| Poland (SC) | Royal Russell School |
| Portugal | American School of Bilbao |
| Rep Korea (South) | Haileybury |
| Romania | St Joseph Greek French School |
| Russian Federation (*SC) | Terenure College |
| Rwanda | Coláiste Bhaile Chláir |
| Serbia | Queen’s Gate School |
| Sierra Leone | Queen’s Gate School |
| Singapore | Colegio Ayalde |
| Somalia | Colegio Ayalde |
| South Africa | ACS Egham Int’l School |
| Spain | Gymnazium Omska, Prague |
| Sri Lanka | Gordon’s School |
| Sudan | Frankfurt Int’l School |
| Sweden (SC) | Benenden |
| Switzerland | Cours St Charles |
| Syria | Royal Russell School |
| Tunisia | ACS Egham Int’l School |
| Turkey | Wycombe Abbey |
| UAE | FMV Erenkoy Isik |
| Uganda | St Andrew’s, Dublin |
| Ukraine | St Gerard’s School |
| United Kingdom (*SC) | Frankfurt Int’l School |
| USA (*SC) | Habs Boys |
| Uzbekistan | Terenure College |
| Zimbabwe | Exeter School |
