Amazon.com description: Product Description: 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 video 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 Part 3 contains units 9-12 of Interchange Intro.