This paper reviews the research evidence concerning the use of formal instruments to measure students' evaluations of their teachers, students' satisfaction with their programmes and students' perceptions of the quality of their programmes. These questionnaires can provide important evidence for assessing the quality of teaching, for supporting attempts to improve the quality of teaching and for informing prospective students about the quality of course units and programmes. The paper concludes by discussing several issues affecting the practical utility of the instruments that can be used to obtain student feedback. Many students and teachers believe that student feedback is useful and informative, but for a number of reasons many teachers and institutions do not take student feedback sufficiently seriously.