Valerie Strauss shows why the entire process in suspect in this post on the Answer Sheet.
A number of teachers never got the full five evaluations, apparently because a number of master teachers hired to do the jobs quit, according to sources in the school system. But even if they all were, let’s look closely at this: In 30 minutes, a teacher is supposed to demonstrate all 22 different teaching elements. What teacher demonstrates 22 teaching elements -- some of which are not particularly related -- in 30 minutes? Suppose a teacher takes 30 minutes to introduce new material and doesn’t have time to show. ... Oh well. Bad evaluation.In many cases, Rhee is even ignoring her own evaluation process and firing teachers and school staff arbitrarily, in hopes of impressing her corporate and foundation patrons and getting a leg-up on Race To The Top funding.
Rhee has used the vagaries of the contract to fire the first volley in what's bound to be a full-scale war, with the firing of 241 teachers. So far, the war has been one-sided with only Rhee's side on the attack. Hopefully, that will change.