A student is considered tardy when not present in the classroom at the time that the bell signals the start of class.
All tardies are recorded so as to be fair and consistent with all students.
It is inappropriate for a student to use a bathroom or water fountain visit to extend the time of a passing period, even if that student leaves a bag in class.
It is appropriate and courteous for a student to plan to use the bathroom before class so as to be present during the entire class.