The study examined the effect of international student teaching experience on the professional and personal development of preservice teachers. 26 graduate students in a private university in Turkey had a two-month internship in a mid western state in the United States. The main component of the internship was a six-week student teaching experience in high schools. The findings suggest that the international student teaching experience and the overall internship program with its cultural components contributed in a positive way to student teachers’ professional and personal development and helped student teachers increase their cultural awareness.