Here are tools for teachers that can easily be adapted for classroom use. When possible I’ve included the .pdf for you to preview and a document file that you can download and personalize for classroom needs.
This is a poster I would place on the bulletin board in my classroom to reminds students not to be late to class. This poster can also be used as an inclass activity. Pass out the poster to a group of students.
Have students create comics for different reasons to be late and present to the class. Follow up by reminding students to inform the teacher about what happened when lateness occurs.