Extreme English! contains over 45,000 English words and phrases, including basic vocabulary (Basic English collections in various language versions), technical and scientific vocabulary (Advanced English), and highly advanced vocabulary required on college exams in the United States (Power Words!). In addition, the package includes English grammar (exercises for the most important problems of English grammar), irregular Verbs (a collection of essential irregular verb forms), and pronunciation and spelling (which enables you to practice pronouncing and spelling those English words which foreigners find the most challenging).