Taking a variety of forms, (crossword puzzles to cartoons) the exercises give practice in applying the rules and principles of German grammar. Many draw on real-life sources, such as newspapers, business literature and 20th-century novels, to provide enjoyable and effective methods of learning. Giving students practice in those areas of grammar where most problems are encountered, the exercises also allow them to gain an authentic sense of current usage. Particular attention is paid to those aspects of grammar which are found especially difficult by English-speaking students.