Paul Broadbent is a full-time writer and maths consultant with 30 years' experience in primary education. He is a best-selling author with over 250 maths books to his name, with recent texts published in Africa, the Middle East and the UK. As well as his many maths books for schools and the home, he has written a number of schools television, radio and computer programmes for the BBC. Paul also aims to inspire teachers through his courses and workshops on primary teaching and the learning of mathematics. He has recently gained an MA in Education, researching the nature of deep subject knowledge needed by primary teachers when teaching mathematics. Mary Ruddle.