Mário Melo is Invited Assistant Professor of Multimedia Communication at ISCTE-Sintra. His research focuses on the design and validation of digital educational resources for teaching Physics, based on the 4C/ID instructional design model. In this context, he is also interested in the development of meta-analysis studies on the efficiency of the 4C/ID model on the ability to transfer learning. The design and validation of multimedia resources built on R. Mayer's Theory of Multimedia Learning and Sweller's Cognitive Load Theory are also preponderant in his research activity.