Sentences with phrase «biased measure of teacher effectiveness»
A simple classroom average gain could then be a statistically biased measure of teacher effectiveness, meaning it would systematically under - or over-estimate a teacher's ability depending on the characteristics of the students assigned to her.
http://www.carnegieknowledgenetwork.org/ Not exact matches
But if the scores are flawed, biased, or incomplete measures of learning or teacher effectiveness, the models won't pick that up.
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.
Kane's research was, of course, used to support the claim that bad teachers are causing the disparities that he cited, regardless of the fact the inverse could be also, equally, or even more true — that the value - added measures used to measure teacher effectiveness in these schools are biased by the very nature of the students in these schools that are contributing their low test scores to such estimates.