Of course! You can take a course any times you want. There are no limits. You can take many times quizzes and QCM. You just have to play again that particular course. The system will take into account your best result for the final score, so you can improve your performance !
By clicking on "Historique" button you can access to all your course scores.
You have access to all scores given for any time you have played the course.
Note : Beware however, final exams or assessments can be done once.