This PREP package attempts to provide answers to some basic questions on teaching. The topics considered are class size, lectures versus discussions, student versus instructor-centered teaching, student versus teacher-led discussions, print material and programmed learning, independent study, simulation, and student characteristics of intelligence, cognitive style, authoritarianism, sociability, affiliation, anxiety, and sex. The conclusions indicate that small classes are probably more effective than large, discussions more effective than lectures, and student-centered discussions more effective than instructor-centered discussions for the goals of retention, application, problem solving, attitude change, and motivation for further learning. There is also some evidence that different teaching methods work well for differing types of students. One implication of the findings is that there should be a variety of teaching methods used within a college, and teachers should develop a repertoire of skills. Students should be offered various options within a course to maximize their motivation and learning. There is also a bibliography of 254 items. (MBM)