If you were to use this topic the you could say that the consequences of not doing the work in class means lower grades, having to make it up, not know how to do the work next time... Then use your own example from school. you would need a thesis like "The consequence of not doing the work in class was having missing work, not getting a good grade, and having to make it up." then use each of the different consequences as a paragraph and use your own personal references.
