Catholic high school teachers instruct students in the same subjects as teachers at non-Catholic high schools, including English, math, history, science, PE, and electives. The primary differences are that Catholic high school teachers may also teach religion class and incorporate tenets of the faith throughout their curriculum; the curriculum used at the school may be from Catholic publishers that integrate faith-based lessons throughout the textbooks. Catholic high school teachers also have the same job duties as other teachers. You develop lesson plans to support your curriculum, lead classroom discussions, administer tests, and assign and correct homework. Most schools also hold a weekly or monthly Mass for students and teachers during the school day.