"States failing to develop systems to keep good teachers, fire bad" (Arizona Daily Star, 01/30/09)

tates are not doing what it takes to keep good teachers and remove bad ones, a national study found. Only Iowa and New Mexico require any evidence that public school teachers are effective before granting them tenure, according to the review released Thursday by the National Council on Teacher Quality.

Growth Data for Teachers Under Review

As states’ information-collection systems grow more sophisticated, officials are grappling with where to draw the line on how “value added” data on teachers can be used. Education Week, October 20, 2008