Jim Grant is an experienced university lecturer in primary and early childhood mathematics education. He is a former primary teacher, a regional consultant and state curriculum consultant with the NSW Dept of Education and Training and closely involved in the development of both the 1989 and 2002 NSW K-6 Mathematics Syllabus documents. He is a co-author of several mathematics series for both Cambridge University Press and other publishers. Ed Lewis is an experienced and well-known mathematics education author and consultant who teaches at Australian Catholic University. He is an advocate of quality maths programs that provide practical, stimulating and thought-provoking activities for children and has written many titles and series that support teachers in realising this mission. Andrew Woods is an experienced author of over 24 educational titles. He worked for 20 years as a primary classroom teacher at all year levels and for 7 years as a rural primary school Principal. Now working as a full-time author from his home in North East Victoria, Andrew has produced well-received material in both the literacy and numeracy areas for a number of publishers.