Will Value-Added Data Help Move Out Ineffective Teachers?

In this article in Educational Researcher, Marcus Winters (University of Colorado/ Colorado Springs) and Joshua Cowen (University of Kentucky) examine the efficacy of using value-added data to dismiss ineffective teachers. Drawing on retrospective test-score data from Florida, they come to two conclusions: 

• First, students assigned to teachers who would have been dismissed one or two years earlier based on a single year of value-added data did significantly worse than students assigned to teachers with more positive data. In other words, value-added data can predict many teachers’ future classroom performance.

• Second, the way value-added evaluation is being implemented – waiting for two consecutive years of data before taking job action – undercuts its effectiveness and results in very few ineffective teachers being dismissed. “Consecutive-year policies that set relatively low percentile cutoffs for satisfactory performance will tend to remove very few teachers because even very bad teachers might score above the threshold in 1 of 2 years due to random fluctuation in the estimates of their effectiveness… and many ineffective teachers will remain unidentified,” say Winters and Cowen. “[O]ur evidence also indicates that no system of evaluation will eliminate flaws from the measure of teacher ability.” 

Winters and Cowen conclude that implementing value-added evaluation of teachers will result in few if any improvements in the quality of teaching. 

“Who Should Stay, Who Should Be Dismissed? An Empirical Consideration of Value-Added Teacher Retention Policies” by Marcus Winters and Joshua Cowen in Educational Researcher, August/September 2013 (Vol. 42, #6, p. 330-337), 

http://edr.sagepub.com/content/42/6/330.abstract; the authors can be reached at 

mwinters@uccs.edu and joshuacowen@uky.edu.

From the Marshall Memo #501


Tags: teacher evaluation

Views: 156

Reply to This






School Leadership 2.0 is the premier virtual learning community for school leaders from around the globe.  Our community is a subscription based paid service ($19.95/year)  which will provide school leaders with outstanding resources. Learn more about membership to this service by clicking one our links below.


Click HERE to subscribe as an individual.


Click HERE to learn about group membership (i.e. association, leadership teams)


Amazon/SL 2.0 Book Store

School Leadership 2.0

© 2016   Created by William Brennan and Michael Keany   Powered by

Badges  |  Report an Issue  |  Terms of Service

Welcome to School Leadership 2.0, the professional learning network for school leaders from around the globe!