So I've been having this long ass argument with my boss for two years now about what to do with students who are late to class.
I lock the door when class starts. Five minutes later, I open it and let the stragglers in. Five minutes later, I open it again, and it stays unlocked. It keeps them from blasting through the door every two minutes, with a full head of steam screaming SORRY I AM LATE and disrupting the hell out of my shit.
When I was teaching back home, I was not allowed to admit students if they were more than five minutes late. 1 second late is a tardy. Three tardies were a detention (or Saturday School) and a phone call home. Five minutes plus one second and you were absent, and you needed a pass from the principal or secretary (not your mom) to get in the door. Ten absences and you were legally truant and social services were called. In some districts, this meant that you were brought before a hearing and your credits for that semester could be revoked.
So here in Korea, at a public school, how do they handle students late to class?