In 2010, the Los Angeles Times made history when they published test-score data and rated teachers according to their ability to influence student learning. While some may have interpreted this move as demoralizing teachers, research conducted by University of Chicago economists Peter Bergman and Matthew Hill for Economics of Education Review published last month revealed otherwise: it actually caused a spike in teacher turnover over one year!
Researchers not employed by the Times employed an innovative method for comparing teacher scores before and after ratings were published. Their sample included teachers who taught 60 or more students over five years; this enabled them to track any changes over time as their scores changed over time. They also took into account other variables which may impact results such as class size, grade level or peer effects so as to be certain differences were due to teacher skill rather than other variables.
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