While teaching and therefore teacher education in Mexico can, in one sense, be traced back to pre-Conquest Aztec military academies, the first significant expansion of Western-style schooling in Mexico occurred in the early 19th century, while the first substantial national efforts at teacher education date to the Porfiriato in the late 19th century. In the 100-plus-year history of teacher education in Mexico, attention has been episodic, has often reflected national refractions of ideas originating elsewhere, and has been centrally intertwined with national governmental efforts to shape what it means to be Mexican. Variously, teacher education has been buffeted by attempts to be Catholic, modern, secular, socialist, neoliberal, and globally competitive economically. In all of this, there has been a tension between centralist (focusing on Mexico City) and nationalist impulses, on the one hand (making teaching patriotic work and the teachers’ union part of the national government), and attention to regional variations, including Mexico’s indigenous populations, rural populations, and economic diversity, on the other. While Mexico’s more than two million teachers may all work in the same country, where one is trained (i.e., which escuela normal, or normal school), where one works (from public schools in affluent and stable neighborhoods to rural telesecundarias where resources are scarce and teachers are not expected to be content area experts), how many shifts one works (it is common for Mexican educators to work at more than one school to compensate for limited salary), which state one works in (funding varies significantly by state), and what in-service professional development one has access to all mean for variations in teacher preparation and teacher praxis.