* VOCABULARY IN USE series is appropriate for classroom use and for self-study reference and practice. * One hundred units cover approximately 2,500 new vocabulary items at intermediate level and 3,500 at upper-intermediate level. * Promotes good learning habits and teaches students how to discover rules for using vocabulary correctly. * A complete answer key is included along with an index with phonetic transcriptions.anied by fluency activities and offer a variety of approaches to vocabulary development.through improvisations around the business themes.