The worksheets for levels 1-3 cover various topics (e.g. What would you take with you on a deserted island? Horoscopes; The ideal teacher etc.) which connect discussion points with grammar. The grammatical structures are embedded in context and become meaningful to the student.
Grammatik & Konversation is used best within a review of previously learned structures. It can be used with any textbook or course material. The table of content clearly spells out for the teacher which structures are reviewed in the given exercise.