VAM

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tandfonline.com – Value-Added and Student Growth Percentile Models: What Drives Differences in Estimated Classroom Effects?

Posted on by Troels Gannerup Christensen - Læst 28 gange

tandfonline.com har udgivet en rapport under søgningen “Teacher Education Mathematics”: ABSTRACT Formulae display:?Mathematical formulae have been encoded as MathML and are displayed in this HTML version using MathJax in order to improve their display. Uncheck the box to turn MathJax off. This feature requires Javascript. Click on a formula to zoom. ABSTRACT This study shows value-added models (VAM) and student growth percentile (SGP) models fundamentally disagree regarding estimated teacher effectiveness when the classroom distribution of test scores conditional on prior achievement is skewed (i.e., when a teacher serves a disproportionate number of high- or low-growth students). While conceptually similar, the two models differ in estimation method which can lead to sizable differences in estimated teacher effects. Moreover, the magnitude of conditional skewness needed to drive VAM and SGP models apart… Continue Reading →

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tandfonline.com – Discussion of the American Statistical Association’s Statement (2014) on Using Value-Added Models for Educational Assessment

Posted on by Troels Gannerup Christensen - Læst 24 gange

tandfonline.com har udgivet en rapport under søgningen “Teacher Education Mathematics”: Abstract In a recent statement, the American Statistical Association (ASA) discusses the use of value-added measurement to evaluate teacher quality. We present our views on the issues raised by the ASA, in light of research we and others have done on this subject. We highlight areas of agreement with the ASA statement, clarify which issues raised by the ASA have been largely resolved, and point to those issues which should be a priority for future research. Link til kilde