Prof. Dr. Olaf Zawacki-Richter, Professor of Educational Technology, Center for Open Education Research (COER), Faculty of Education and Social Science, Carl von Ossietzky University of Oldenburg, Germany.Prof. Dr. Michael Kerres, Professor of Educational Science | Learning Technology & Innovations, Learning Lab, University of Duisburg-Essen, Essen, Germany.Dr. Svenja Bedenlier, Research Associate, Center for Open Education Research (COER), Faculty of Education and Social Science, Carl von Ossietzky University of Oldenburg, Germany.Melissa Bond, Research Associate, Center for Open Education Research (COER), Faculty of Education and Social Science, Carl von Ossietzky University of Oldenburg, Germany.Katja Buntins, Research Associate, Learning Lab, University of Duisburg-Essen, Essen, Germany.