I've been sticking with two classes per term for my family of four sims at college, and actually do homework for both of their classes on Saturday to start the term. Then I do any term papers and presentations on Sunday, and turn them in asap. It doesn't end anything; all options are still there. The simplest way I've found to keep track of homework is to just have them do it for the class they just came home from right away. Other than lateness from the buggy go to class early, this all seems to work pretty well.