Target audience: Learners preparing for the First Certificate (levels B1 - C1) who wish to expand their knowledge of grammar and vocabulary. Concept: The workbook is based on the B1, B2, and C1 levels of the Common European Framework of Reference. In 28 chapters, grammar and vocabulary units are alternately covered. In addition to clear overviews, the material offers a variety of practical exercises to reinforce and review what has been learned. The reference section also includes helpful representations of irregular verbs, phrasal verbs, collocations, and idioms. Tips on word formation and differences between British and American English, as well as a glossary, complete the offering.