Juanjo Mena, Ph.D. (2007), is Associate Professor at the Department of Education of the University of Salamanca (Spain). He is a member of the GRIAL research group and the treasurer of the International Study Association on Teachers and Teaching (ISATT). His research interests are focused on the analysis of the teaching practice, mentoring and the practicum, Teacher Education and ICT. Ana García-Valcárcel is Professor of Educational Technology at the University of Salamanca and Director of the Master in ICT in Education. She is also Head of the GITE-USAL Research Group. Her areas of expertise are digital technologies integration, teacher training in digital skills, evaluation of digital skills and the use of video games. Francisco José García Peñalvo, Ph.D. (2000), University of Salamanca, is full Professor at the Computer Science Department of the USAL and he is Director of the GRIAL Group. He was Technology and Innovation pro-Vice Chancellor of the USAL in charge of the definition, planning and development of the USAL technical management strategy based on Open Source solutions.