- 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 full-color Video Activity Book is designed to accompany the Video. It provides pre and post-viewing tasks for the learner. There are Follow-up and Language Close-up sections for those who want to use the Video as the basis for a short course or to review more thoroughly the contents of the Student"s Book.