Just the research we all want to see: Multiple measures doesn't mean muddied mess

The National Council on Teacher Quality

Value-added measures are often criticized for providing a narrow view of a teacher's performance. Conversely, broader measures like observations are seen as too subjective. A new study shows--happily--that both types of evaluations are consistent and complementary: they predict future students' achievement. Teachers who score well on one also score well on the other. Best of all, combining them produces a stronger and more accurate measure of a teacher's effectiveness than using either alone.

Jonah E. Rockoff and Cecilia Speroni of Columbia University looked at the ability of three measures to predict teacher effectiveness: a rigorous job application process, observations and ratings by trained mentors, and value-added calculations based on students' math and English scores.

Posted by Jim Zellmer at November 3, 2011 1:55 AM
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