Beyond The Great Teacher Myth

Practical Theory:

"The "great teacher" myth continues. This is the myth that says, "If only we could get rid of the really bad teachers, we'd have better schools." It's particularly pernicious because it sounds so easy, right? Let's just dump the bottom (5% / 10% / 33% - depending on who's writing) and even if we only replace them with "average" teachers, we'll be better off, right?

Right?"