»Ach so« oder »aha«? Die Bedeutung von Mündlichkeit in DaF und DaZ

Students of German as a foreign and second language are often confronted with the problem that dialogues in textbooks rather resemble written than oral German. Oral language phenomena are neglected and generally not systematically presented. This also applies for recent online textbooks. It is a wasted opportunity since multimedia content may be easily used for contrasting formal and informal speech.