The article examines 21 biliteracy teachers who studied and taught in schools through an eight-week in-service professional development program with indigenous children in the state of Altacomulco, Mexico. In the process of documenting their international teaching experiences, a study was conducted to ascertain biliteracy teachers' development of their teaching ideology as a result of their participation and critical reflection, using Spanish as the primary mode of instruction. Five themes are discussed: globally minded teachers; linguistic and culturally relevant curriculum; passionate pedagogy ("amorosidad"); community authentic engagement; and political and ideological clarity.