Ravitch: Value-added study inflates earnings potential

01/17/2012 | Education Week

A recent study by Harvard and Columbia university researchers reports that students taught by top teachers earn more money over time, but education historian Diane Ravitch dissects the study's claims and its potential consequences. The study found that a teacher can raise a class' lifetime earnings by $266,000, which Ravitch breaks down to about $250 per student per year. The study, which appears to support value-added assessments, could cause schools to focus primarily on tested subjects, she argues.

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