Progressive Maths Unit 4: The Number Line is the second book to be published in the Interactive Lesson Planners series. It teaches you to recognise number and to follow the process of addition to make larger amounts. It has teacher notes as aims and objectives. Also. To test to see if you understand there are money problem solving activities. Once that is achieved pocket money can be used for purchasing products. It deals with addition of small amounts to enable easier understanding. The book is aimed at helping you learn about the world also.