Our connected world is exploding with images and sounds of cultural hybridity and fluidity. Mathematics classrooms, however, remain frozen in time. One consequence of this inertia is that mathematics education, rather than being a way to provide opportunities that lead to better lives for students, continues to limit those opportunities by reproducing existing societal inequities (Ernest, 2009). The inertia continues despite Herculean efforts by a range of stakeholders in mathematics education to broaden and diversify the voices participating in classroom mathematical conversations. What does the contrast between the increasingly dynamic and “flattened” (Friedman, 2005) nature of our global culture and the static and hierarchical nature of the mathematics classroom have to do with a book about classroom mathematical discourse and issues of equity?