New elements in Volume 4: Double-sided background file in each unit with cultural information about the USA. Americana highlights on the country and its people. Each unit includes a reading course page for systematic work on reading comprehension. Continuation and deepening of test preparation. The final unit offers the opportunity to stage a mystery play. Interconnection: The basic edition and the extended edition are interconnected to ensure smooth transitions: identical unit sequence, coordinated topics and language tools, similar exercises. The basic edition Volume 4 is characterized by simpler texts, fewer new language tools, and easier exercises with more support. Internal differentiation in both editions: In addition to the parallel tasks known from Volumes 1 and 2 in the practice section, there are again the More Help tasks, where weaker students receive additional support.