- 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 1, builds on the foundations established in the Intro level for accurate and fluent communication, extending grammatical, lexical, and functional skills. Topics such as school, work, leisure activities, entertainment, and food 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.