I usually have several school board employees as my clients, and it never fails that when they are off work(Xmas/March Break) their kids are always here much longer than a typical day of attendance. They're dropped off earlier, and picked up later. I have verbal agreements on set hours due to high needs of certain children, yet they always seem to be here about an hour longer when they're off on holidays. Should I put the agreed upon hours in writing, or any suggestions on how to put an end to this behaviour??