Tenure is under fire. Conservatives have long attacked such policies as tenure that constrain the ability of managers to fire whomever they want, but the latest assaults on tenure have invoked liberal egalitarian ideals. With all the problems in education, why are we so fixated on teacher tenure? What is really going on? How did tenure get its…

Maligned and revered, exemplified or reviled, almost every discussion about charter schools involves a tangle of differing histories, theories, values, and facts. Worse, many times the parties to the discussion aren't even aware they're operating on different planes of discourse. A sort of mental gridlock often results. But by separating…