When teachers say "I'll write you up" it means they're writing a referral for you to the office.
Which is bad.
Hm, well i don't want a referral :/
i mean i only got like 6 of them the whole time i was at school, And most of the time that was because i kept wondering around where i shouldn't have been.
Al though once it was because i jabbed some guy in the eye with a pencil. Accident :3