Bettina Dahl received the first M.Sc. (cand.scient.) degree in mathematics from Aalborg University, Aalborg, Denmark, in 1997, and the second M.Sc. degree in educational research methodology from the University of Oxford, Oxford, U.K., in 2000, and the Ph.D. degree in mathematics education from Roskilde University (DK), Roskilde, Denmark, in 2003. She is an Associate Professor with the UNESCO Center for Problem-Based Learning in Engineering Science and Sustainability, Aalborg University, and a Professor of Mathematics Education with the University of Bergen, Bergen, Norway. Previously, she was an Associate Professor with Aarhus University (DK), Aarhus, Denmark, working with educational development in higher education in science and mathematics. Before that, she was an Assistant Professor with Virginia Tech, Blacksburg, VA, USA, working with mathematics teacher training for the secondary level and previously, she was an Advisor with the Norwegian Centre for Mathematics Education, Norwegian University of Science and Technology, Trondheim, Norway.