A student needs to understand the importance of homework. They should be made clear of the fact that without practicing anything they will never be able to be the best one in the class. So the more they would be practicing the greater would be there grades and thus they will be always ready to face challenges, be it in assignments or exams. These things should be engraved in a student from the very childhood else it will be difficult for them to cope with the upcoming pressure in higher classes.
A 4th grader student understands what is right for them and what is wrong so it is the prime time to beat the iron and cast as you want. They should be taking their studies more seriously than their playing and other stuffs. This does not mean that they should not play at all, but they should learn how to manage their stuffs along with their enjoyment. The subjects vary in from a wide range starting form English, History, Geography, Science etc. they have to divide their time equally to have the best of everything.
There are many rules to follow to become master at completing their works in time. All they need to do is to abide by those things perfectly without being concerned of the situation and other things.