Peter Clarke has been a mathematics coordinator and deputy headteacher in primary schools in Australia and London. He has also worked as a mathematics advisor and has written many publications on primary mathematics. He also lectures on initial teacher training and postgraduate courses, and runs INSET at schools and conferences.Lisa Jarmin is an experienced primary school teacher, Early Years specialist and education journalist. She works as a consultant for primary schools, advising on their curriculum, and has written many publications across a number of subjects including primary mathematics.

Peter Clarke has been a mathematics coordinator and deputy headteacher in primary schools in Australia and London. He has also worked as a mathematics advisor and has written many publications on primary mathematics. He also lectures on initial teacher training and postgraduate courses, and runs INSET at schools and conferences.Lisa Jarmin is an experienced primary school teacher, Early Years specialist and education journalist. She works as a consultant for primary schools, advising on their curriculum, and has written many publications across a number of subjects including primary mathematics.

Peter Clarke has been a mathematics coordinator and deputy headteacher in primary schools in Australia and London. He has also worked as a mathematics advisor and has written many publications on primary mathematics. He also lectures on initial teacher training and postgraduate courses, and runs INSET at schools and conferences.Lisa Jarmin is an experienced primary school teacher, Early Years specialist and education journalist. She works as a consultant for primary schools, advising on their curriculum, and has written many publications across a number of subjects including primary mathematics.