This article aims to define the notation system and identify these elements, these different types and functions, also the contributions of the docimology to explain the factors or the three error sources that defect the notation namely; the evaluation itself, the teacher and the student. Thus, scoring is one of the educational tools used by teachers to make sense of the judgments they make about a student and to monitor how well the students have achieved the goals set for teaching-learning. Grades from 0 to 20, grades or categories ordered A, B, C, D, E, and ratings, are the three most used types of notation in the school system, they are considered a way to communicate between school institutions and parents of students.