The curricular structure of Taking Action is described and analyzed as a form of culturally responsive and culturally specific pedagogy. In this design structure, students reconsider what they have done and identify key aspects of their experience. Based on this reflection, they design a way to interact with people outside of their class in order to make an impact on the world. Curricular design structures may be a research direction for mathematics education, independent of content or pedagogy; this would e a new form of theoretical action in our field, with its own typography, concepts, and dynamic relations, a.k.a. a "curriculum studies" of mathematics education.