John Deasy

John Deasy, incoming superintendent of schools in Los Angeles, says of the change: “We are not questing for perfect. We are questing for much better.” (Irfan Khan, Los Angeles Times / March 28, 2011)

In Houston, school district officials introduced a test score-based evaluation system to determine teacher bonuses, then — in the face of massive protests — jettisoned the formula after one year to devise a better one.

In New York, teachers union officials are fighting the public release of ratings for more than 12,000 teachers, arguing that the estimates can be drastically wrong.

Despite such controversies, Los Angeles school district leaders are poised to plunge ahead with their