| SCHOOL | 1st Delegation | 2nd Delegation | 3rd Delegation | 4th Delegation | 5th Delegation |
| Ampleforth College | Belarus | Mali | | | |
| Anatolia High School | Croatia | Qatar | | | |
| Bishop Thomas Grant | India | Mauritania | | | |
| Blackrock College | Denmark (SC) | Afghanistan | | | |
| Calday Grange | Israel | | | | |
| Catholic University School | Venezuela | Niger | | | |
| Cheadle Hulme School | Liberia (SC) | Cuba | Canada | | |
| Civico Polo Scolastico, Milan | Congo (Dem Rep) (SC) | Spain | | | |
| Coloma Convent Girls School | Pakistan (SC) | Australia | | | |
| Cours St Charles | Iran | Finland | | | |
| Croydon High School | Colombia (SC) | Syria | Lithuania | Türkiye | |
| Frankfurt Int’l School | USA (SC) | Malaysia | Norway | | |
| George Cosbuc , Bucharest | Greece (SC) | | | | |
| Gonzaga College | Poland | | | | |
| Gordon’s School | Somalia (SC) | Oman | Korea (Rep) – South | | |
| Habs Elstree Schools | Bahrain (SC) | UAE | | | |
| Hitachi Daiichi Senior High | Philippines | Thailand | | | |
| Mount Anville School | Japan | Egypt | | | |
| Rathdown School | Russian Fed (SC) | Cameroon | Viet Nam | | |
| Royal Russell | Germany | Chile | | | |
| Santa Margarita Catholic High | Ukraine | Nigeria | Mexico | | |
| Sezin Okulu | Singapore | Brazil | | | |
| St Andrew’s College | UK (SC) | Senegal | South Sudan | Uruguay | Yemen |
| St George’s British School | Panama (SC) | Sweden | Ireland | Korea (Dem Rep) – North | |
| St Gerard’s School | Lebanon | | | | |
| St Joseph’s Gr/Fr School | France (SC) | Iceland | Cyprus | | |
| St Paul’s College | Latvia (SC) | | | | |
| Terenure College | China (SC) | Chad | Iraq | | |
