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Does Value-Added Work Better in Elementary Than in Secondary Grades?

Abstract

"Value-added methodology is being applied to the evaluation of teachers in tested grades and subjects, but the vast majority of the research on value-added measures focuses on elementary schools only. Secondary grades differ from elementary grades in ways that are meaningful for the validity and reliability of value-added measures for secondary teachers. Middle and high school teachers have more students, which increase reliability of value-added scores, but this advantage is offset by tracking, which reduces reliability at those grade levels."

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