Holy Trinity students are tested in grades 1–8 and the Archdiocese has chosen Terra Nova, The Second Edition Plus which tests the five main content areas of Reading, Language Arts, Mathematics, Science, and Social Studies. Additionally, five sub tests - word analysis, vocabulary, language mechanics, spelling and mathematics computation are also given. Grades 3, 5, and 7 are given a multiple assessment test. Constructed response items on these tests require students to create their own answers by writing a paragraph, or drawing a graph or model.