This theoretical article draws from the political thought of Jacques Rancière to trouble some taken-for-granted conceptions of citizenship education. Rancière's notion of politics and dissensus (as opposed to consensus) can lay the groundwork for a version of citizenship that challenges what is deemed sensible, visible, who is counted in communities and on what grounds. This version of citizenship, based on politics and dissensus, disrupts the taken-for-granted social order and seeks to establish equality for those who are what Rancière calls "the part of no part." In science, math, and technology education this means rethinking how we approach social and political issues and civic identities, where consensus seeking and nonactivist choices for students prevail. I conclude the article by outlining examples of science education research that work to "redraw the lines" of the social (the social being the stakes of the political); in particular, the Idle No More movement, which is at the forefront of both scientific and political activism in the geographic space known as Canada.