Interchange Third edition is a four-level series for adult and young-adult learners of English from the beginning to the high-intermediate level. Student"s Book 2 builds on the foundations established in Level 1 for accurate and fluent communication, extending grammatical, lexical, and functional skills. Topics such as travel, childhood, customs, personality, and predicaments are presented in unique ways using interesting real-life information. The 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. Student"s Book B contains units 9-16, the second half of the complete Level 2 Student"s Book.