Marianne Knaus is a lecturer in the Early Childhood Education program at Edith Cowan University, Perth, Australia. She teaches in both the undergraduate and postgraduate programs, and co-ordinates the Early Childhood Mathematics programs and the first year Professional Practice unit in Childcare.

Sally Featherstone has a wealth of experience as a teacher, head teacher and a local authority adviser and inspector. In recent years, alongside her activities in publishing, Sally has continued to build a national reputation as a trainer and consultant in the Primary and Early Years field.