Focus builds an overall framework for understanding the organization of the English language and helps students recognize the inseparable relationship between form, meaning, and use. The Workbook is designed primarily to supplement the Student's Book, but can be used as a useful source of information and practice on its own. The exercises are intended for individual work outside of class or for use as part of class discussions and activities. Each chapter, which corresponds to a chapter in the textbook, includes focused exercises that allow students to concentrate on one particular structure, integrative exercises where structures from previous sections or chapters are “spiraled” in with new structures, practice with prepositions, and editing exercises.