Professor Alison Clark-Wilson works at the Institute of Education, University College London. Her research spans aspects of designing, implementing, and evaluating educational digital technologies with a particular interest in mathematics education. More specifically, she researches the more dynamic mathematical technologies alongside teachers' professional trajectories as they come to know and use such technologies. Beyond mathematics, Alison has extensive experience of working with governments, civil society organisations and industry partners on initiatives that aim to bridge research knowledge with educational technology product design and evaluation processes.Professor Ornella Robutti works in the Mathematics department "G. Peano" at the University of Torino. Her fields of research are students' cognitive processes during mathematical activities; teaching mathematics within technological environments; teachers' work as individuals and in communities, when teaching mathematics, when learning in professional development programs, and when designing tasks for students; meanings of mathematical objects in institutional and social contexts; mathematics students' and teachers' identities; boundary objects and boundary crossing between communities.Professor Nathalie Sinclair is a Distinguished University Professor in the Faculty of Education at Simon Fraser University. She is the founding and current editor of Digital Experiences in Mathematics Education and has written several books, including Mathematics and the Body: Material Entanglements in the Classroom. She directs the Tangible Mathematics Project, which has created multitouch applications TouchCounts and TouchTimes.