The Middle School Programme is set within the context of the School's fundamental belief that good classroom practice goes hand in hand with good pastoral care and in the programmes that best suit their needs. In the Middle School the students’ minds are developed through an Academic programme that can be divided into three main phases; transition to Middle School in Year 7, consolidation in Year 8 and moving on to the requirements of the preparation for Senior School in Year 9. Inquiry, effort, persistence, feedback seeking and a growth mindset are key ingredients of learning. Students’ learning needs are considered and a focus on individual growth pervades.

The School believes that to develop one's body is an important part of school life and that a boy must be involved in sports programmes, with an emphasis on physical fitness, skill and team building. From Year 7 students are required to be involved in a Summer and Winter sport which would involve mid-week training and a Saturday commitment. In the Middle School, Sport training is inside the timetabled school day.

The Middle School marks the commencement of an extensive Co-curricular Programme that continues for all Trinity boys until Year 12. Whilst no co-curricular activity is compulsory in Year 7, boys in Year 8 must participate in either one of the many auditioned Music groups or the School's Cadet Corps as the minimum commitment but may also join additional co-curricular activities. The highlight of the boy's development is the 4 week Field Studies Programme in Year 9. Students also commence a Life Skills Programme in Year 7 that aims to equip students with the skills needed to manage many of the issues they are likely to be confronted with throughout life.

The Middle School at Trinity recognises that a boy's potential will flourish in an environment where he is valued and where he has the opportunity to develop his understanding of the Christian faith, to pursue his interests and to discover his gifts and abilities. He is encouraged to grow in wisdom and stature and in favour with both God and man.