Activities are conceive to help fixing and verifying the concepts discussed during the lessons. As such, activities are opened only in a restricted time window. 

After an activity has closed, participation is registered, then an open version (no time limit) of the activity is exposed, for Students who could not participate in the original one, or for revising. 

Participation to "open activities" will NOT be considered for the evaluation of internal course participation.   

Please read the first lesson pdf for more information on the internal activities, Reports and exam; also "Exam rules" file.