Public school teachers and their unions are under a sustained assault that is still unfolding. In 2010 Michelle Rhee, former Washington, DC, schools chancellor, announced the creation of a multimillion-dollar lobbying organization for the explicit purpose of undermining teachers unions. She has charged that “bad teachers” are the primary cause of the problems that beset America’s schools. New York Mayor Michael Bloomberg has asserted that effective teachers need no experience. Romanticizing the young, energetic, passionate (read: cheap) teacher, he has made eliminating seniority preferences in layoffs (aka, last in, first out—or LIFO) his pet cause (it has been stymied for the time being by the state legislature).