主要協助學生累積字彙量(build vocabulary)，培養閱讀技巧(reading skills)、表達(presentation)與批判性思考(critical thinking)的能力。
字彙課綱編排參照2800字「基礎字彙表」(New General Service List=NGSL)與1000字「學術字彙表」(Academic Word List=AWL)，此兩字表共3800字，約涵蓋92%常用學術字彙。
各式線上資源(Online Resources & APP)提供更多練習機會。
Interchange Fourth 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 A, Intro is the introductory level of the Interchange Fourth Edition series and is designed for beginning students needing a thorough presentation of basic functions, grammar structures, and vocabulary. Intro is based on the principle that low-level learning does not equal low-level thinking. Student's Book A, Intro contains units 1-8, the first half of the full Student's Book, progress checks, additional Interchange activities, and a Grammar Plus section that provides additional grammar explanations and practice. Included is a Self-study DVD-ROM that provides the full class video and extra practice with vocabulary, grammar, speaking, listening, and reading.
You can free download from Cambridge website http://www.cambridge.org/interchange/audioprogram/