Another Newsweek item on Teach for America includes the following (also unattributed, by the way, but I won?t quibble with that flaw twice in one hour):

It’s the teachers, stupid! The single most important factor in student achievement is the quality of the teacher. And yet, we have no effective system to attract, train, retain and promote high-caliber candidates for our schools. Today’s teachers score in the lowest quartile of college grads and too many of the schools that train them are diploma mills.

We?ll ignore for a moment the author?s failure to use a comma in a compound sentence. Instead we?ll recall that another Newsweek columnist identified last month one of the key factors holding back education reform: teachers? unions.