In the mid-nineties, the Alfred Glickman School was just another failing school in one of America's most violent cities. Then SABIS?, a private, for-profit education provider, took over. Twenty years later, the school is a six-time silver medalist in U.S. News & World Report's annual "America's Best High Schools" listing, and every single graduate of the school has been offered a college place. With success of this magnitude, you would think that...