If the Obama administration has one good idea, it belongs to Education 

 Secretary Arne Duncan who is promoting value-added education. Rather than just viewing education as a process—as educators have done for years—or turning it into a series of national tests, as No Child Left Behind has done, value-added education asks how much each student has learned each year in school.

The problem is that it would also give policy makers the ability to see which teachers and schools really make a positive difference in actual student learning. Needless to say, this scares teachers’ unions—who are more concerned about their members’ pay and job security than student learning. 

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