In this case study, the author investigated how international teaching assistants in the U.S. learned English language and teaching skills within a course they took about teaching at an American college. Four participants from three different countries and three disciplines volunteered to participate in this study. The results suggested that by talking with a partner, all of the participants acquired communication and conferring skills and learned teaching skills by practicing, sharing, getting feedback, and reflecting with their peers. All participants contributed to this social learning environment and enjoyed the communication between each other no matter what backgrounds and disciplines they came from. Their conversations revealed their strengths and challenges and represented their various cultural backgrounds, disciplines, and personal goals. The findings from this study suggest that teachers in the international teaching assistant training program should encourage peer learning and provide opportunities for students to work in pairs or small groups. They should also plan meaningful activities for students through which students can learn language skills and cultivate communicative competence.