Oda Heidi Bolstad is Associate Professor of Mathematics Education at Volda University College, Norway. She is a teacher educator and her research areas include mathematical literacy and mathematical modelling. Simon Goodchild was Professor at the University of Agder, Norway. He was a mathematics teacher educator who has published research on mathematics teaching in higher education. Merrilyn Goos is Adjunct Professor of Education at the University of the Sunshine Coast, Australia. She is a mathematics educator who has published research and teacher education resources on numeracy across the curriculum and across the lifespan.