The class is taught by a team of professors, usually three, who specialize in literature, theology, philosophy, or history.[52] Students move through Western history, studying original texts in each of the four course disciplines.[2] The new Development of Western Civilization Program, implemented in late 2012, features three semesters of standard lectures which move chronologically from ancient history to the modern period. The fourth and final semester of the program is organized into various colloquia, specialized courses taught by two professors that are more concentrated to students' interests and majors.[53]