- Interchange Third Edition is a 4-level series for adult and young adult learners of English from the beginning to the high-intermediate level. The Student"s Book, Level 3, builds on the foundations established in Level 2 for accurate and fluent communication, extending grammatical, lexical, and functional skills. Topics such as relationships, the media, self-improvement, business and advertising, and controversial issues are presented in unique ways using interesting real-life information. Each Student"s Book contains 16 teaching units, frequent Progress Checks that allow students to assess and monitor their own learning, and a listening self-study section. Included is a Student Audio CD that contains the Conversation, Pronunciation, and self-study section from the Student"s Book. As with the other levels of Interchange Third Edition, a complete set of ancillaries is available to make classes productive, varied, and fun.