Cosmopolitanism refers to becoming a world citizen who can live harmoniously with different cultures. Today, our classes in the United States have become diverse daily. While we teach students who can speak more than one language, our teachers are primarily monolingual and monocultural. Hence, teachers who can speak multiple languages are celebrated in the system (Pacheco et al., 2019). Expatriation refers to teacher mobility that can entail learning other languages and being exposed to different cultures. Expatriation, as a form of travel, is an essential construct for cosmopolitan literacies because cosmopolitan dispositions can be developed through traveling (Molz, 2006). Thus, this study focuses on a formerly expatriated teacher who speaks three different languages and works in a middle school. Adopting an intrinsic case study (Stake, 1995), I focus on the interaction between the teacher and students and her personal account regarding how to incorporate local and global cultures within the classroom. The documentation she uses, such as lesson plans, and school position papers, are used to cover every dimension of her teaching. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com.bibliotheek.ehb.be/en-US/products/dissertations/individuals.shtml.]