Students enrolling in this course get the opportunity to participate in an international research project named P.I.A. (“Praxisphasen im internationalen Austausch”), which is part of a collaboration between Leuphana University Lüneburg (Germany) and PH Wien. The aims of this project are to explore the added values a transnational collaboration contributes to the practical education in teacher training programs. Our focus of interest is to investigate successful ways of teaching heterogeneous learner groups in the context of TEFL.