This is a book of co-ordinates for the younger pupil. Its purpouse. . . to lead children gently and enjoyably into using co-ordinates. All kinds of numbers are used: whole, negative, and fractional, and the children are asked to do the calculations to obtain co-ordinates drawing delightful pictures. The whole ethos of the book is one of discovery, anticipation, and fun. It can be used by the teacher in the classroom, or by parents with their children.