1. Technology-Enhanced Learning, Heidelberg University of Education, Heidelberg, Germany
2. Educational Technologies, DIPF – Leibniz Institute for Research and Information in Education, Frankfurt am Main, Germany
3. StudiumDigitale, Goethe-University, Frankfurt am Main, Germany
4. Faculty of Education, Adiyaman University, Adiyaman, Turkey
5. Learning Analytics, Open University of the Netherlands, Heerlen, The Netherlands