| Delegation | SCHOOL |
| Austria | Colegio Ayalde |
| Belgium | Colegio Ayalde |
| Belize | Shrewsbury |
| Brazil | North London Collegiate School |
| Canada | Lingfield College |
| China (*SC) | Cheadle Hulme |
| Colombia | Shirley High School |
| Costa Rica | Lycée François 1ere |
| Cuba | ACS Egham |
| Cyprus | ACS Egham |
| Egypt | Lycée François 1ere |
| Estonia (SC) | North London Collegiate School |
| France (*SC) | Habs Boys |
| Georgia | Hurstpierpoint College |
| Germany | Colegio Ayalde |
| Greece | Bishop Thomas Grant |
| India (SC) | ACS Egham |
| Iraq | Habs Boys |
| Ireland (SC) | Royal Russell School |
| Kenya (SC) | St Ives |
| Korea (Dem Rep) – North | St Ives |
| Korea (Rep) – South | Terenure College |
| Lebanon | Hurstpierpoint College |
| Mexico (SC) | Bishop Thomas Grant |
| New Zealand | Shirley High School |
| Niger (SC) | Coloma |
| Norway (SC) | Gordon’s School |
| Panama | Hurstpierpoint College |
| Poland | ÅS Videregaende Skole |
| Russian Federation (*SC) | Terenure College |
| Rwanda | Royal Russell School |
| Saint Vincent & The Grenadines (SC) | |
| Saudi Arabia | Ste Victoire Int’l School |
| South Africa | Royal Russell School |
| Spain | Ste Victoire Int’l School |
| Sweden | George Cosbuc High School |
| Syria | Gordon’s School |
| Thailand | Reigate Grammar |
| Tunisia (SC) | Reigate Grammar |
| Turkey | Terenure College |
| United Kingdom (*SC) | Shrewsbury |
| USA (*SC) | Hurstpierpoint College |
| Viet Nam (SC) | Lingfield College |
| Yemen | Cheadle Hulme |
