Stacy, Brian - Deutsche Zentralbibliothek für … - 2014
' achievement increases after being exposed to the teacher, or based on the teacher's "value-added''. When teacher value-added is … heterogeneous across her students, the typically used measure reflects differences in the average value-added the teacher provides …. However, researchers, administrators, and parents may care not just about the average value-added, but also its dispersion. In …