This book is the fruit of my experience as a teacher and trainer in secondary and higher education. It takes up the essence of my tasks and activities in didactics in the initial training of future high school and college teachers in history-geography. It evokes the teaching practice and analyzes upstream, what contributes to the implementation of school knowledge in class. To do this, it gives a place to didactic documents in the conduct of the lesson. It also focuses on evaluation in education as well as on learning assistance activities. It discusses the importance of instructions in the construction of school knowledge. The instruction is the basic tool for the construction of knowledge, the means allowing the learner to get involved in the learning activities. How can we help them understand instructions? This book does not provide recipes, but shows, based on the author's experiences, how to make instructions accessible in the teaching of history in middle and high school. It discusses the place of instructions in teaching and learning.