This article details the experiences of Ignacio Bonillas, one of the first Mexican students to graduate from Arizona’s territorial schools and explicates how those experiences impacted his perceptions of U.S. and Mexican citizenship. Bonillas’s story illustrates how definitions of citizenship in the Arizona-Sonora borderlands were permeable and dynamic before the era of Americanization and encourages teachers and students to interrogate the ways restrictive notions of citizenship are reproduced in public schools. This article goes on to argue for inviting students to access local archives and create case studies of figures whose experiences challenge the Americanized histories of their region.