IN A nation as politically and ideologically riven as ours, it’s remarkable to see so broad an agreement on what ails public schools. It’s the teachers. Democrats from various wings of the party, virtually all Republicans, most think tanks that deal with education, progressive and conservative foundations, a proliferation of nonprofit advocacy organizations, right-wing anti-union groups, hedge fund managers, writers from right leftward, and editorialists in most mainstream media—all concur that teachers, protected by their unions, deserve primary blame for the failure of 15.6 million poor children to excel academically. They also bear much responsibility for the decline of K-12 education overall (about 85 percent of all children attend public schools), to the point that the United States is floundering in the global economy.
In the last few years, attention to the role of public school teachers has escalated into a high-profile, well-financed, and seriously misguided campaign to transform the profession based on this reasoning: if we can place a great teacher in every classroom, the achievement gap between middle-class white students and poor and minority students will close; all students will be prepared to earn a four-year college degree, find