We match administrative data on Chicago public high school students and teachers at the classroom level to estimate the importance of teachers to mathematics test score gains. We show that sampling variation and other measurement issues are important drivers of naïve estimates of teacher effects, in some cases accounting for the majority of dispersion in teacher quality. However, correcting for these problems, teachers are still economically and statistically influential. Replacing a teacher with another that is rated two standard deviations superior in quality can add 0.35 to 0.45 grade equivalents, or 30 to 40 percent of an average school year, to a student's math score performance. Furthermore, the teacher quality ratings are relatively stable within an individual instructor over time and reasonably consistent across most student types, with the notable exception of the lowest achieving students, where the same two standard deviation improvement in teacher quality adds only 0.20 grade equivalents. Finally, we relate our measured teacher effects to observable characteristics of the instructors and show that the vast majority is unexplained by standard observable characteristics of teachers, including those that are typically used for compensation purposes
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Paper provided by Federal Reserve Bank of Chicago in its series Working Paper Series with number
WP-02-28.
References listed on IDEAS Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
Hanushek, Eric A., 2002.
"Publicly provided education,"
Handbook of Public Economics,
in: A. J. Auerbach & M. Feldstein (ed.), Handbook of Public Economics, edition 1, volume 4, chapter 30, pages 2045-2141
Elsevier.
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