You could not bring the best out of your work. You do cramming and it reduces the efficiency of your work; the result is same like now I am having while writing on this journal.
It is natural because when you are in stress, your mind shuts off, thoughts are all jumbled and the outcome of it is not good. What you want to say does not make any sense and you make a fool of yourself.
The causes of stress vary among people belonging to different fields whereas it is very commonly observed that the students are actually hassle about their assignments.
At the end of the term, they are out of time to complete their coursework and could not meet their deadlines which make them tense and as a consequence, their ability to produce good work is badly affected.
However the only way to evade this situation is to plan out the schedule and divide the work into smaller segments, try to disciplined oneself.
Alas! It never happens and every term the students do what they have done in their previous terms.