When the federal law known as No Child Left Behind was signed by President George W. Bush eight years ago, it was heralded by both Republicans and Democrats...This week, President Obama and his secretary of education, Arne Duncan, rolled out their plan to reauthorize and rethink the law....And we sample two among many reactions to the president's plan now, with Bob Wise, president of the policy group Alliance for Excellent Education -- he served as the governor of West Virginia from 2001 to 2005 -- and Diane Ravitch, an education historian, official in the Education Department of the first Bush administration, and author most recently of "The Death and Life of the Great American School System."