Undergraduate courses in the humanities are traditionally either seminars or lectures held one- or two-times a week with an additional conversation-based seminar called a "discussion group". To graduate, all students must complete a liberal arts core curriculum known as the "University Core", comprising 18 classes of various subjects. Students have a high degree of latitude in creating a self-structured Core, which allows students to study subjects of interest outside their chosen major. Most of the Core classes at Trinity Western are led by a full-time professor (as opposed to a teaching assistant).