D.C.'s teacher-evaluation method draws fairness questions

School districts nationwide are considering new ways to evaluate teachers and many are looking at the Impact system in Washington, D.C., which focuses heavily on test scores and five annual classroom observations and can result in dismissals for teachers deemed ineffective. Many educators, however, say Impact -- which was adopted under former Washington, D.C., schools chancellor Michelle Rhee -- ignores students' socioeconomic status and other factors beyond their control. Some also say the system favors teachers at wealthier schools who face fewer challenges. The New York Times