A lively and fun dictionary to introduce key mathematical words and ideas to children aged five to seven years in primary school. It contains over 200 mathematical words in alphabetical order, each with a simple meaning or example of use. Every word is illustrated with friendly artwork or clear diagrams to help make meanings clear. At the back of the book is an illustrated section which gives extra words that children will discover and use in their maths lessons - from time words to classroom equipment. All the words in the dictionary have been carefully chosen to support and develop mathematical language and understanding and the book links to the National Numeracy Framework at Reception, Y1 and Y2.