The Extreme English Intermediate Course is a set of 9,800 words and expressions at the intermediate level, also including business vocabulary. This course contains vocabulary items required for the following exams: Cambridge Preliminary English Test (PET), First Certificate in English (FCE) and Business English Certificate (BEC). This set of vocabulary is actively used by the native speakers of English and it allows the learner to communicate in a variety of situations common in a given language-speaking region, including business situations. Mastering this set of vocabulary items allows the learners to understand the spoken and written language and to talk about a wide range of concrete and abstract topics. These language skills correspond with the B1-B2 levels of The Common European Framework of Reference for Languages.