“…What is central to these arguments is that learning is facilitated through encouraging all students to actively participate in exploring learning domains, discussing alternative ideas and perspectives, offering explanations, clarifications and justifications to each other and devising shared goals and plans of action, and thereby facilitating their understanding [1,13,28]. In light of these characteristics of collaborative learning, interactive tabletops have been argued to have various properties that promote the collaborative nature of these learning activities, for example, the ways that they organise groups around digital learning materials to encourage face to face discussion; how they enable simultaneous participation in collaborative learning, promote engagement and allow all students to share control and responsibility over the input and manipulation of learning materials; and how they make individual interactions at the tabletop visible to support shared awareness [6][7][8].…”