This teacher''s book contains helpful notes on the texts in Understanding Ideas, giving information about the authors, contexts or cultural background where this seems desirable. It also provides answers to all the questions set on the texts and sugg estions for follow-up work such as writing, discussion and role-playing. Those texts in Understanding Ideas which lend themselves to oral exploitation have been recorded on cassette. The teacher''s book suggests ways to use the recording, for example , for global or detailed listening comprehension, pronunciation work or as an aid to oral presentation of a text intended for intensive language study.