Claire Maxwell is a reader in Sociology of Education at UCL Institute of Education, University College London, UK.
Ulrike Deppe is a post-doctoral researcher at the Centre for School and Educational Research at the Martin-Luther-University Halle-Wittenberg, Germany.
Heinz-Hermann Krüger is Professor of General Education Science at the Martin-Luther-University Halle-Wittenberg, Germany.
Werner Helsper is Professor of School Research and General Didactics at the Martin-Luther-University Halle-Wittenberg, Germany