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 Interchange Third Edition Full Contact Edition includes five key components of Interchange Intro all under one cover: the Student's Book; the Video Activity Book; the Workbook; the interactive CD-ROM; and the Self-Study Audio CD. Each Student's Book contains 16 teaching units, frequent progress checks that allow students to assess and monitor their own learning, and a self-study section. The Workbook has six-page units that follow the same sequence as the Student's Book, recycling and reviewing language from previous units. The full-color Video Activity Book is designed to accompany the videos and provides pre- and post-viewing tasks for the learner. The CD-ROM provides engaging and enjoyable interactive activities for users to do on a computer at home or at school and includes sequences from the Interchange videos. The Student's Self-Study Audio CD includes the Snapshots, Word Powers, conversations, pronunciation, and self-study sections from the Student's Book. Interchange Intro Full Contact B contains units 9–16 of Interchange Intro.