All Trinity School students follow the same curriculum. The curriculum is carefully constructed as an integrated and coherent whole. Each element of the curriculum is purposefully related to the learning environment and to the rest of the curriculum. Each course builds on those that precede it.

Borrowing from the elements in the classical notion of a liberal education, we stratify the curriculum according to the categories of grammar, logic and rhetoric. The seventh and eighth grades are considered grammar courses; they communicate the basic elements of things. The ninth- and tenth-grade courses are logic courses, which begin to articulate the implications and relationships that exist among the ideas already learned. The eleventh- and twelfth-grade courses are rhetoric courses, wherein the students begin to synthesize and interrelate ideas and concepts that they have already learned.