If public-school teachers spent more time teaching in classrooms and less time community-organizing in political war rooms, maybe taxpayers wouldn't feel as ripped off as they do. Before the Big Labor bosses start complaining about "teacher-bashing," let's be clear: An increasing number of rank-and-file teachers feel exactly the same way. Retired New York teacher Vinne Cusimano, who was required to pay forced union dues in order to work, wrote me this week after receiving the March 2011 edition of his union's monthly publication. The cover of the New York State United Teachers magazine reads: "Defend What Matters! Educate. Collaborate. AGITATE."...