The transnational diasporas in a technological world that is postmodern and posthuman mean both exciting diverse communities and challenging problems. On the one hand, globalization brought human beings the convenience of exchanging ideas, doing business, and building a better world together. On the other hand, the political economy of nation states that shaped non-translational ideologies, created at the same time conflicts and misunderstandings among citizens from different parts of the world. Responding to the current transnational clashes in flow (information dissemination) and contra flow (surveillance and control of information flow) of our information age, this dissertation builds up a transnational rhetoric and communication model that can be used to examine the curriculum design, teaching materials, and pedagogy in communication and writing studies, especially in technical communication. In addition, this study investigates the present state of curriculum design, teaching materials, and pedagogies in a southeastern higher education institution. Empirical data was collected from students, instructors, and administrators from different departments of this institution to determine whether and how do curriculum design, teaching materials, and pedagogies frame and teach transnational literacy. Further, to engage the conversation with a national audience, major introductory technical communication textbooks were analyzed based on both the empirical data and the transnational rhetoric and communication model using content analysis. The findings indicate that although curriculum design, textbooks, and pedagogies have transnational components, they generally reply on traditional models and stereotypical examples that cannot meet with students’ needs in order for them to become genuine world citizens with transnational awareness and competence. The transnational rhetoric and communication model helps to fill the gaps in curriculum design, textbook revision, and pedagogies in cultivating world citizens.