Interchange Third edition is a four-level series for adult and young-adult
learners of English from the beginning to the high-intermediate level. The
interleaved Teacher's Edition features complete teaching instructions, learning
objectives, optional activities, teaching tips, listening scripts, language
summaries, and Student Book and Workbook answer keys. Also included are written
and oral quizzes, games, photocopiable activities, and fresh ideas for
presenting and expanding upon the main exercise types in the Student's Book.