Dr. Panagiotis Politis is an Assistant Professor of ICT in Education, Department of Primary Education, University of Thessaly, Volos, Greece. He holds a BSc in Physics from the University of Patras, Greece, and a MSc and a PhD, both in Didactics of Informatics, from the University Paris 7, France. He specialises in the area of ICT in Education, Educational Software Development and Didactics of ICT. His research interests include ICT in Education, Modelling Software Design, pedagogical software evaluation and E-learning. Dr. Ilias Karasavvidis is Assistant Professor on ICT and Learning in the Department of Preschool Education at the University of Thessaly, Greece. He is the head of the ICT Research Unit of the Natural Sciences and Technologies Lab in the same Department.