Claire Mooney is an Instructor at the School of Education and Professional Learning, Trent University, Canada. Alice Hansen is the Director of Children Count Ltd where she is educational consultant. Her work includes running professional development courses and events for teachers and teacher trainers, research and publishing. Alice has worked in education in England and abroad. Prior to her current work she was a primary mathematics tutor and the programme leader for a full-time primary PGCE programme at a large university in England. Lindsey Ferrie is a primary school teacher in Carlisle. Sue Fox has had extensive experience of teaching all ages from Reception to Year 6. She was Senior Mathematics Lecturer at St Martin's College, Carlisle.

Reg Wrathmell is Senior Lecturer in Mathematics Education at King Alfred's College, Winchester. He has extensive experience as a mathematics consultant and as a provider of in-service courses.