Book 1 is intended for children who are leawrning English for the first time. It covers, at an easy pace and with plenty of "built-in" revision, fifteen essential grammatical structures, about 180 content words, and a small number of useful everyday expressions. Although the basic principle is that of meaningful oral communication, Book 1 also provides some preliminary practice in reading. The plentiful illustrations and functional use of colour are designed to make the maning clear at all times to all students.