The units focus on the recognition, acquisition and reinforcement of vocabulary while linking the language introduced in each topic area to related areas of grammar. Level A2-B1 and beyond Fusion offers an integrated approach to learning vocabulary and grammar. Fusion can be used in the classroom as a self-contained vocabulary development and grammar revision course, as a supplement to a main course book, as a source of revision and practice material, or for self-study. The organisation and selection of topics is based on the 14 Specific Notions of the Common European Framework of Reference. 2008