Structured and clearly explained. Do you sometimes find yourself facing the problem that children or teenagers challenge you with their questions while learning mathematics, making it difficult to explain? "What is Pi, anyway?" or "Why can't I calculate 5:0?" The question that ultimately plays a crucial role in explaining is the question of HOW. How can I structure and formulate my explanation so that my counterpart actually understands it? This practical book with learning offers is aimed at anyone who has to answer mathematical questions in teacher training or in everyday school life. The first two chapters of the book present theoretical insights into explaining. Based on these insights, the third chapter offers concrete and practical learning opportunities.