Work assigned daily from teachers. You work hard all night getting the work from that day done, and get even more the next day. Gets progressivly worse as you get older.
In kindergarten our homework was to jumprope 50 times. We had that assignment twice, and no other homework. Now we have at least two or three essays a week along with a whole crapload of other assignments from the rest of our classes. And most of the teachers suck at teaching.