The centerpiece of Race to the Top is evaluating teachers by test scores. The students of good teachers, Arne Duncan and Barack Obama believe, get higher scores. If they have low scores, it is the fault of bad teachers. There was no evidence for their beliefs, other than the speculations of economists and statisticians. Real teachers never believed the theory, because they know that many favors affect test scores, not just teachers.

Thirty five states and DC followed Duncan’s lead, even though his hunch lacked any evidence . Lyndsey Layton has a comprehensive article in today’s Washington Post, describing the latest study to disprove Duncan’s theory.

Spurred on by Duncan, many states now use test scores to determine tenure and compensation. Duncan recently said he wants to judge the quality of teacher education programs by the test scores of students taught by their graduates.

Secretary Duncan’s love affair with standardized testing is inexplicable. There can be no question that he has caused immense damage to children, teachers, and public education.