Kofi Balmer played for the Northern Ireland Schoolboys on 29th March 2018 against the Republic of Ireland in the Centenary Shield competition gaining his first ‘Schoolboy Cap’. Kofi had gained this achievement whilst still attending Ballyclare Secondary School.
The Northern Ireland national under-18 schools football team (also known as Northern Ireland U18 schoolboys) represents Northern Ireland in association football at under-18 level. It is controlled by the Northern Ireland Schools Football Association (NISFA) which is affiliated to the Irish Football Association. The main competition competed for by the team is the Centenary Shield (founded 1973) which they won on the first occasion that they entered in 1996. The Northern Ireland under-18 schoolboys side also competes regularly in other minor tournaments and in friendlies.