Herrmann, Mariesa; Walsh, Elias; Isenberg, Eric; Resch, … - Mathematica Policy Research - 2013
accountability systems, affects the value-added estimates of teachers of students with hard-to-predict achievement levels, such as … students who have low prior achievement and receive free lunch. Teachers of these students tend to have less precise value …-added estimates than teachers of other types of students. Shrinkage increases their estimates’ precision and reduces the absolute …
