A national union is praising a new study that found that offering performance bonuses to teachers does nothing to raise test scores. But the Obama administration criticized the report by Vanderbilt’s National Center on Performance Incentives, which showed that students in classrooms where teachers got bonuses fared no better than those with no special incentives.

Former California State Schools Superintendent and current consultant on education issues Delaine Eastin weighs in on the results of the new study.

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