While the discussion on education for deliberative democracy is increasingly gaining prominence, there is a deep gap between the theories of deliberative democracy and democratic education with respect to what deliberative democracy is and ought to be. As a result, theories and practices of democratic education tend to be grounded in a narrow understanding of the meaning of deliberative competencies, students' deliberative agency, and the role of schools in deliberative democracy. Drawing on the latest theorization of deliberative democracy -- deliberative system theory -- this article aims to question and revise these assumptions. The article suggests that meta-deliberation is a key practice that can reconcile the gap between the two theories.