http://www.econ.ucdavis.edu/faculty/scarrell/profqual2.pdf
"In primary and secondary education, measures of teacher quality are
often based on contemporaneous student performance on standard-
ized achievement tests. In the postsecondary environment, scores on
student evaluations of professors are typically used to measure teach-
ing quality. We possess unique data that allow us to measure relative
student performance in mandatory follow-on classes. We compare
metrics that capture these three different notions of instructional qual-
ity and present evidence that professors who excel at promoting con-
temporaneous student achievement teach in ways that improve their
student evaluations but harm the follow-on achievement of their stu-
dents in more advanced classes."
