Learning is the activity of people without experience, this is why it’s normal for a scholar to make errors during the formation. Pedagogically, error is an answer or a behavior which doesn’t correspond to what is expected of the learner. If traditionally the concept of error was related to that of mistake, which has negative connotations, then the modern pedagogy instructs that students’errors should be taken into account. The error is no longer a manifestation of ignorance which would be advisable to indulge or correct right away, but it is an inadequate knowledge upon which the right knowledge will be built.