Researchers have looked at just about every possible determinant of teaching success, and it seems there’s nothing on a prospective teacher’s résumé that indicates how he or she will do in the classroom. While some qualifications boost performance a little bit—National Board certification seems to help, though a master’s degree in education does not—they just don’t improve it very much.
Ray Fisman in Slate on “Why are public schools so bad at hiring good instructors?”
