This case study addressed effects of international student teaching on U.S. teacher candidates' cross-cultural adaptability and perspectives on language, culture, and schooling. Interviews and the Cross-Cultural Adaptability Inventory were collected from 18 participants before and after 4 weeks student teaching internationally. Interviews were coded using the Cross-Cultural Adaptability Inventory dimensions and interpreted using Mezirow's transformational learning theory. Findings suggested that increased cross-cultural adaptation aligns with transformational learning. Transformational learning led participants to question assumptions and consider incorporating different perspectives in future teaching.