Los Angeles Times
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The recent groundbreaking agreement over evaluations for educators in the Los Angeles school district is a major victory for the teachers union because it limits the use of a controversial — but increasingly widespread — measurement of teacher effectiveness.
The tentative pact puts the nation's second-largest school system at odds with a national trend to gauge the effect of teachers on student achievement by using a value-added analysis. That method, known in Los Angeles Unified as Academic Growth Over Time, is opposed by many teacher unions as unreliable; but it is being used in Illinois, New York, Texas, Florida, Washington, D.C., and elsewhere.
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