Its main education board of choice is CCEA, but the school also uses AQA and Edexcel for certain subjects.

[1] Aquinas was established by the Diocese of Down and Connor as a co-educational voluntary Grammar School.

[2] The school's motto is Veritas Liberabit which is Latin for "The truth will set you free".

Its main education board of choice is CCEA, but the school also uses AQA and Edexcel for certain subjects.

In 2018 it was ranked joint first in Northern Ireland for its GCSE performance with 100% of its entrants receiving five or more GCSEs at grades A* to C, including the core subjects English and Maths.