A superstar teacher or charismatic principal rides to the rescue! Downtrodden public school children, otherwise destined to fail, are saved! We've all seen that movie—more than once, starting with "Stand and Deliver" and "Lean on Me" in the late 1980s and more recently with documentaries like "Waiting for Superman" and "The Lottery," which brilliantly portray the heroes of the charter-school movement. And we know the villains, too: teachers' union leaders and education bureaucrats who, for four decades, have presided over schools that provide comfortable public jobs for the adults who work there...