Not long ago, I had the good fortune to find a seat at a special screening of the new documentary "Waiting for Superman" in Ann Arbor. The documentary is a skillfully constructed view of how our urban public schools often fail their students, though it is not without some serious faults. (Many of those are discussed better, elsewhere.) But the film overreaches when it tries to claim that because some urban schools are in trouble, the entirety of American public education is in trouble. That claim, for which the film provides no evidence, motivates the film's call for radical reform. But if the problems are not so endemic, and if different schools struggle with different issues, maybe the answer is more complicated, and varied, as well.