Evaluating methods for evaluating instruction

"This paper studies methods for evaluating instruction in higher education. We explore student evaluations of instruction and a variety of alternatives. We develop a simple model to illustrate the biases inherent in student evaluations. Measuring learning using grades in future courses, we show that student evaluations are positively related to current grades but uncorrelated with learning once current grades are controlled. We offer evidence that the weak relationship between learning and student evaluations arises in part because students are not aware of how much they have learned in a course. We conclude with a discussion of alternative methods for evaluating teaching"--National Bureau of Economic Research web site.