The French grading system is based mostly on a 20-point grading scale: it is used above all in secondary schools and universities. The baccalauréat uses the 20-point scale, with the following mentions (honors):
18-20 : Congratulations (félicitations du jury not an official grade)
16-17 : very good (très bien : TB)
14-15 : good (bien : B)
12-13 : satisfactory (assez bien : AB)
10-11 : pass (passable)
8-10 : pass ("passable") as long as the overall average of grades remains above 10
0-8: Fail (insuffisant)
Primary schools generally use a 10-point grading scale or a letter grade like the ECTS grading scale. French universities traditionally use the 20-point grading scale, but the ECTS grading scale is more and more common, since it is the standard for comparing study performance throughout the European Union.
Some Grandes écoles use 'exotic' systems, like Ecole Centrale de Lille, which uses a three-letter scale system:
A: Excellent
S: Satisfactory (satisfaisant)
I: Fail (insuffisant)