I use these classroom posters to encourage students from arriving tardy to my class. I put up different colors for different classes and then the classes compete with one another to see who can get the best attendance. Of course, you can include a prize or incentive for this competition as well. Administrators love these signs and it is a fun way to help students get to class on time! Please note: you will definitely want to laminate these posters and use a dry erase marker for continuous updating throughout the year.