A reader raises good questions in this comment. I’d written that, on average, Master’s degrees don’t produce better teachers. The question, then, is are there specific programs that stand out?
In a more perfect world, researchers would be able to look at student outcomes and then link those outcomes back to the schools that the students’ teachers had attended. So far as I know, no one’s been able to do this yet. What does exist is a careful set of evaluations of a couple of hundred teacher preparation programs by the National Council on Teacher Quality. I recommend looking at these. If you’re thinking of becoming a teacher and you live in Colorado, Illinois, Indiana, New Mexico, Texas, Utah, or Wyoming you’ll find these reports especially helpful as the NCTQ rates programs by name.