Sentences with phrase «unstable measure of teacher effectiveness»

Their findings described VAM as an imprecise and unstable measure of teacher effectiveness, particularly if the student assessment data are not of high quality or do not cover a sufficient number of years from which to predict student achievement with any degree of accuracy.

Not exact matches

In addition to the fact that the tests are narrow and do not measure higher - order thinking skills, researchers have found that value - added models of teacher effectiveness are highly unstable: Teachers» ratings differ substantially from class to class and from year to year, as well as from one test to the next.

More specifically, the district and its teachers are not coming to an agreement about how they should be evaluated, rightfully because teachers understand better than most (even some VAM researchers) that these models are grossly imperfect, largely biased by the types of students non-randomly assigned to their classrooms and schools, highly unstable (i.e., grossly fluctuating from one year to the next when they should remain more or less consistent over time, if reliable), invalid (i.e., they do not have face validity in that they often contradict other valid measures of teacher effectiveness), and the like.

Given the growing understanding that value added measures (VAMs) of teacher effectiveness rely upon tests not designed to detect teacher input, are highly unstable, and can not account for teacher impact on variability among student scores, it is quite apt that Dr. Audrey Amrein - Beardsley of Arizona State University and a leading researcher on value - added measures, described the proposal as going from «bad to idiotic.»