HSY expansion age off/ rotation question

I play rotationally, and I'm not too worried. As it is now, my children and teens don't get better grades or more badges in Scouts, but they don't get worse. I think the game assumes they're at school. With University, I've found that signing up for the next round of classes on Saturday, puts my Sim in position to do a semester during the week. I just don't sign them up for more classes when they get their grades. They lose their scholarships, but usually money is not a problem. Oh, and they live at home, not in a dorm.