You have heard today that Michelle Rhee (who, interestingly enough, is marrying our mayor here in Sacramento next month) fired 241 teachers today in Washington, D.C. — 165 because of poor evaluations used in a flawed assessment system. You can read more about it at the Washington Post, “The problem with how Rhee fired teachers.”
The New York Times also has an article worth reading about the firings, including good responses from local and national teacher union leaders.
You can read my thoughts on the evaluation system in a previous post titled Evaluating Teachers In Order To Fire Them? I also share there evaluation methods that I have found helpful to my own teaching practice.
For additional useful ideas on teacher assessment, you might want to check-out The Best Resources For Learning About Effective Student & Teacher Assessments.