But I do know that I've worked for a principal who would do exactly what was written about here (Not a principal at the think tank, where I work now). I know that this can happen. In the cases I know of it happening the teachers decided to look for another school before it got this bad- and most found a much better fit at another school where they went on to shine.
But this situation is not out of left field.
I hate for this to be supported as a case for using test scores as a significant portion of teacher evaluations because I do not think that is the answer. But what is the solution? Better structured observations from principals with a check list of what they observed? Something like DCPS has in place where outside observers observe teachers? My husband's company does 360 Reviews where a sampling of everyone he works with gives feedback. Would something like that help give a bigger picture of what is occurring inside classrooms?