Nick Kristof and the School Reform Straw Man

A new research paper by a team of economists got a lot of pretty favorable press because it appears to deliver results that would seem to confirm what many in the media believe about American schools: If you could just use standardized test scores to weed out underperforming teachers, you would see serious improvement in school achievement. Media coverage often glosses over the core problem here, which is how you measure teacher performance in the first place. The “value-added” research that is touted by many pundits–using test scores to determine a teacher’s effectiveness–is controversial in large part because critics don’t […]