What's the Best Way to Grade Teachers?

Kristina Rizga:

>Last year, battles over charter schools dominated much of education coverage. This year, the controversy over "teacher evaluations" is poised to be the biggest fight among people with competing visions for improving public schools. For a primer on how these new teacher assessments work, don't miss Sam Dillon's recent piece in the New York Times. Reporting from Washington, D.C., Dillon found that last year the city fired 165 teachers using a new teacher evaluation system; this year, the number will top 200.

D.C. relies on a relatively new evaluation system called Impact, a legacy of its former school chief Michelle Rhee, who noticed that, despite the district's low test scores, most teachers were getting nearly perfect evaluations. Rhee and the proponents of this new evaluation system feel that the old system relied too much on the subjective evaluations by the principal or a few experienced teachers. Opponents of the old system say these internal measurements are not data-driven or rigurous enough to allow principals and districts to identify struggling teachers who need assistance or to find the successful ones who deserve to be recognized and empowered.

Impact or other new evaluation systems are currently being implemented in around 20 states. The basic idea to use performance-based evaluations that use external measures such as test scores in addition to the internal measures mentioned above. Sparked by President Obama's Race to the Top grants, these "value-added" evaluations rely heavily on kids' test scores in math and reading. Teachers whose subjects are not measured by test scores are observed in the classroom. For example, D.C. teachers get five yearly classroom observations, three by principals and two by "master educators" from other schools.

Posted by Jim Zellmer at July 2, 2011 2:50 AM
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