It’s very difficult to predict who’ll be an effective teacher until the new hire starts teaching, writes Ray Fisman on Slate. The usual surrogates — a teaching credential or a master’s degree — don’t predict whether a teacher’s students will do better or worse than expected. But, once hired, it’s hard to get rid of teachers who just aren’t very good. He suggests a few years of in-service training for would-be teachers before they get a union card and all the protections that come with it.
Don't hire the lemons
July 15, 2008 by