Measuring College-Teacher Quality - Brainstorm - The Chronicle of Higher Education - 1 views
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George Mehaffy on 18 Jan 11"Measuring College-Teacher Quality January 13, 2011, 10:40 am By Kevin Carey David Glenn's Chronicle article on using course sequence grades to estimate teacher quality in higher education illustrates a crucial flaw in the way education researchers often think about the role of evidence in education practice. The article cites a recent study of Calculus grades in the Air Force Academy. All students there are required to take Calculus I and II. They're randomly assigned to instructors who use the same syllabus. Students all take the same final, which is collectively graded by a pool of instructors. These unusual circumstances control for many external factors that might otherwise complicate an analysis of teacher quality. The researchers found that students taught by permanent faculty got worse grades in Calculus I than students taught by short-term faculty. But the pattern reversed when those students went on to Calculus II-those taught by full-time faculty earned better grades in the more advanced course, suggesting that short-term faculty might have been "teaching to the test" at the expense of deeper conceptual understanding. Students taught by full-time faculty were also more likely to enroll in upper-level math in their junior and senior years. In addition, the study found that student course evaluations were positively correlated with grades in Calculus I but negatively correlated with grades in Calculus II."