Firing Bad Teachers Has Surprisingly Meager Effects
Firing Bad Teachers Has Surprisingly Meager Effects
By Kevin Drum
Dylan Matthews of the Washington Post has an interview with Thomas Kane today about ways in which we can measure teacher performance in the classroom. This comes at the very end:Dylan Matthews: Now, the three components you measure predict future performance on achievement tests. But a lot of people dismiss that, even though there’s growing evidence that achievement test scores are correlated with all kinds of important real-life outcomes. Why do these scores matter?
Thomas Kane: So I’m really heartened — even asking that question means you’re aware of that Chetty/Friedman/Rockoff study….What they found was that the teachers who appeared to have high value-added while the students were in their classrooms, their value-added was predictive of students’ income later. I’m