1. Department of Computer Science, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
2. Department of Information Systems, University of Agder, Kristiansand, Norway
3. School of Modeling Simulation and Training, University of Central Florida, Orlando, FL, USA
4. School of Computing and Information, University of Pittsburgh, Pittsburgh, PA, USA
5. UCL Knowledge Lab, Institute of Education, University College London, London, UK
6. School of Telecommunications Engineering, Universidad de Valladolid, Valladolid, Spain
7. Department of Information and Communication Technologies, Universitat Pompeu Fabra (UPF), Barcelona, Spain
8. Learning and Educational Technology (LET) Research Lab, University of Oulu, Oulu, Finland
9. Institute of Educational Technology, The Open University, Milton Keynes, UK