Each unit presents 20 words which are defined and used in sample sentences. The activitiesin the books are designed to present the words in different uses sothat learners can fully see how they can be utilized. Also at the endof each unit there is a story whch contains the units words togive learners further examples of the words in use. Each level properlyprepares the learner for the next which progressively challenges thelearner with more sophisticated vocabulary and stories.