To accurately reflect a student's grade, any assignment that is not turned will have a zero in the space. If the space had a blank for the assignment whether allowed to be made-up or not, the average would reflect a higher grade than is actually the situation. The zero will allow the proper grade average to be reflected. Based on legitimate individual circumstances, the assignment may be one that will be accepted and when made-up will have a change in grade and average eventually reflected. Thank you.