Book excerpt: Pioneering in the comparison of standard language teaching in Europe, the International Mother tongue Education Network (IMEN) in the last twenty-five years stimulated experts from more than fifteen European countries to participate in a range of research projects in this field of qualitative educational analyses. The volume "Research on mother tongue education in a comparative international perspective - Theoretical and methodological issues" documents theoretical principals and methodological developments that during the last decades shaped IMEN research and may enlarge the fundaments of comparative qualitative research in language education in a seminal way. The topics of this volume include: - IMEN's aims, points of departure, history and methodology; - research on the professional practical knowledge of MTE-teachers; - innovation, key incident analysis and international triangulation; - positioning in theory and practice. Also included: the IMEN bibliography 1984-2004 which supplies a complete picture of IMEN research activities from the beginning.