, the dean of the school is professor melissa nobles, and with over 200 faculty members, 330 graduate students, and 109 undergraduate majors and 161 minors, the school is the fourth largest at mit. all mit undergraduates must take at least 8 semesters of courses (approximately 25% of total classroom time) in shass as part of the general institute requirements for a diploma, and those minoring or majoring within the school undertake additional studies and projects.