From The Washington Post: The Washington, D.C., school system has fired 206 teachers for poor performance. That equates to 5 percent of the 4,100 teachers in the school district. They were dismissed for poor scores on the evaluation system known as IMPACT. The evaluation system, one of the nation’s most rigorous and closely watched, is a legacy of Michelle A. Rhee’s tenure as city schools chancellor. Rhee resigned in October and was succeeded by Kaya Henderson.