Absences happen and it's always a good idea to have a 'Sub Binder' put together before the fact - especially in the event of an unexpected absence. This "While You Were Out..." communication form is a great staple to keep in your sub materials. The consistent format helps your substitute zero in on the important info/highlights you're looking for when returning to the classroom and actually having a specific form in the packet will help to ensure that you receive a note from the substitute!