With so many different classes each day, it's difficult for me to keep students up to date on their missed work. I have a spreadsheet for each class that I magnetically post on the closet door. The sheets contain the date, a description of what was covered in class and the homework assignment. I put a reminder for longer-term assignments at the bottom of the page. A student from each class is in charge of filling out the day's information. If a student is absent, they know how to check the posting for missed work without interrupting class. This also allows me to quickly look back at which assignments I need to review with the class the following day.