Using the 1998–99 National Study of Postsecondary Faculty (NSOPF:99), this report examines the extent to which instructional faculty and staff in postsecondary institutions were involved in undergraduate teaching in fall 1998. Specifically, this report examines who, among postsecondary instructional faculty and staff, were more likely to teach undergraduates. It also explores the teaching loads of those who taught undergraduate classes for credit and the teaching practices that they used for their undergraduate teaching.