Ever heard of a matryoshka doll? You may not have heard the name before, but I bet you’ll recognize the concept. You start with a big doll, break it open, and discover a smaller doll inside. That doll contains a still smaller doll, and inside that one is an even smaller one. You’ve got to dig down through an awful lot of layers before you reach the center. (Do you feel the education policy analogy coming on?)
Teacher evaluation is like the center of many education policy matryoshka dolls. In particular, strategic compensation and tenure policies are heavily dependent on the reliability and validity of the teacher evaluations being used. That realization raises some big questions regarding evaluation, some of which I’ve written about before.
As it turns out, even “evaluation” may be too big a doll. A new study by Matthew Chingos, Russ Whitehurst, and Katharine Lindquist argues that the area of greatest concern is more specific still: The portion of evaluations based on classroom observation. Continue Reading »