Interchange Fourth Edition is a four-level series for adult & young-adult learners of English from the beginning to the high-intermediate level Student's Book A Level 1 builds on the foundations established in the Intro level for accurate & fluent communication extending grammatical lexical & functional skills Student's Book A Level 1 contains units 1-8 the first half of the full Student's Book progress checks additional Interchange activities & a Grammar Plus section that provides additional grammar explanations & practice Included is a Self-study DVD-ROM that provides the full class video & extra practice with vocabulary grammar speaking listening & reading