instructions in class of French Foreign Language: What do the teacher request ?

In class, the teachers provide constantly instructions, and the learners must continually perform. But, some of these instructions are not followed ! It is the same of exercises or examination subjects. The instruction poses several challenges both in terms of its formulation or that of his understanding. Formulate an instruction require a great effort, great care and special skills, because of the quality of the latter depends in large part the quality of work performed.