In case you missed it last week, check out this 8 minute video story from John Merrow of the PBS Newshour,
Evaluating Teachers: Are Teacher Unions the Solution?
The focus is the school system in Toledo, Ohio which has had a peer assistance and review program in place since 1981. The program was developed by the union and approved by the local school board. Seems like a good program for new teachers, but for tenured teachers, maybe not so much.
You can listen in to the companion podcast,
The Problem with the Toledo Plan, as well.