One indicator that might be of interest to researchers, students, and parents is the proportion of senior faculty members (i.e., full professors and tenured faculty), particularly those at research and doctoral institutions, who teach undergraduates. Among full-time instructional faculty and staff who taught one or more classes at 4-year doctoral institutions in fall 1998, 63 percent of full professors reported teaching at least one undergraduate class and 37 percent of them reported teaching such classes exclusively. About 69 percent of full-time tenured faculty at 4-year doctoral institutions reported teaching at least one undergraduate class and 41 percent of them reported that all of their classes were at the undergraduate level.