This is my tardy log that I use for my high school class in order to keep track of tardies and minimize classroom interruptions. The first page I recommend printing out on colored paper, and slipping it into the clear outside of a binder. I hole punch the other sheets and keep them in a binder with a pen. Students know to sign in, rather than interrupting the class with their excuses. I tell them I will review their reason later. It works very well.