Trinity Grammar Senior School commences in Year 10 and
concludes after the boys complete their HSC or IB.

The Senior School is a rite of passage during which our young men
deal with developing spiritually, developing freedoms, developing responsibilities and the consequences of choices in a competitive
world.

During these three years our young men are encouraged to increase their understanding of what it means to accept Christ as their Saviour, to realize their academic potential and to learn to live in an increasingly complexworld. As they mature, they will accept that, the more they know, the more they need to know.

Complementing the school's academic system is the boys'
pastoral care with each boy being allocated to a House.
Housemasters and Tutors come to know the interests and
capabilities of the boys in their charge and hold regular House
and Tutor meetings.

Years 10, 11 and 12 are the vital years leading to the transition to tertiary education. The school offers a full range of academic
subjects, including Music and Drama, Computer Design, Information Technology, Physical Education and the rigorous International Baccalaureate program

Social interaction with girls from local schools occurs through academic programs, dramatic and musical productions and social functions.

Peer support, a horizontal year coordination system and vertical integration for academically gifted boys are all part of this important evolutionary period.