I do not know the answer, I do not teach anything, but you can write it off if you do not study at all and you will not check it. Although it's not so bad. I would burn your teacher that you write off assignments, but I can not how we learn in different cities, and most likely in different schools, classes tembolee. Here and so. Better write to classmates. Although it is better not to write off at all and learn by yourself.