This subject has been a long-time concern of mine. Do student evaluations help or hurt teaching and learning? On one hand, student evaluations provide important student feedback about a course, which may encourage the teacher to make positive changes. On the other hand, evaluations ask students to assume an evaluation role that, for some, may diminish the role of the teacher as an expert. For example, at UCSB every course is evaluated by students every time it is taught.