Friday, January 13, 2012
Bill in the Leg, Column in the Times
There must be a teacher evaluation bill in the legislature because there is a guest column about something similar in the Seattle Times. "It's hard to overestimate the value of a good teacher" by Nicholas Kristof is all about the false concept of "teacher quality". It is based on the most ridiculously and obviously flawed analysis possible, the circular logic that great teachers can be identified by how their students' test scores rise and the proof of their greatness can be found in the rise of their students' test scores. We might as well identify great teachers by how much taller their students grow and then use the increase in their students' height as the proof of their great teaching. The truth is that "teacher quality" has only an incremental influence on student test scores and therefore student test scores are an extraordinarily poor measure of teacher quality.