Most liberal political theorists of education argue that it is better to teach students to tolerate diversity, than to protect the potentially illiberal commitments of some members of the political communities. In fact, neither approach is wholly satisfying, yet they remain the focus of much political theorizing about education. This article suggests that this misguided focus is, in part, a consequence of a focus, by liberal political theorists of education, upon the 1987 "Mozert v. Hawkins" court case. "Mozert" raised serious questions about the nature of toleration in liberal society, but from an "educational" standpoint, the "Mozert" case led political theorists to consider what curricular content is appropriate for liberal political education, rather than on the practices that democratic citizens must cultivate. I turn to Hannah Arendt to offer a critical account of the liberal responses to "Mozert" and then call for a theory of democratic education that fosters practices of democratic decision-making and has, as its aim, not merely to foster respect for diversity, but to allow future citizens to practice critical engagement with diversity.