Claire Mooney is an Instructor at the School of Education and Professional Learning, Trent University, Canada. Alice Hansen is an educational consultant who has taught in a wide variety of primary schools in England and abroad. She worked for over a decade in Initial Teacher Education (ITE) as a senior lecturer in primary mathematics education. Lindsey Ferrieis a primary school teacher in Carlisle. Sue Foxhas had extensive experience in teaching all ages from Reception to Year 6 and as a Senior Mathematics Lecturer in ITT. Reg Wrathmell has extensive experience as a mathematics consultant and as Senior Lecturer in Mathematics Education at King Alfreds College, Winchester.