Student tardiness is a frequent problem that teachers face. There are various ways to deal with this problem. One is to talk with the tardy student in private, working together on a plan for being on time. A second is to have a similar talk with the student’s parents. Detention is a third option, albeit a punitive one.
The most effective way to deal with tardiness is very simple to implement. Begin each class promptly with a very short quiz that counts toward a student’s grade for the class. Students who miss the quiz due to tardiness get a zero.