Each time I take up an assignment I staple one of these to the paper. It lists general info like due date, title, value, etc. Then it provides spaces to list students who did not turn in the work, a reason, and any additional info (such as when you gave the assignment again, emailed the parent, etc.) Once I put the assignment in the grade book, I keep these papers in a folder. I have found them very useful in parent conferences and to quickly provide students with missing assignments if they finish another activity with time to spare.