HMMMMMMMMMMMMMMMMM,

That is an easy one to solve.

Dont be an idiot and bring weed to school.
I can hear it all over world
"hello, Mr Jones, we have Bobby up here in the main office. We just caught him smoking marijuana in the bathroom. Ma'am, we have a NO drug policy at this school. ZERO TOLERANCE. You will need to pick him up now. Tommorrow he will be his first day of a 10 day suspension. I suggest he enroll in some kind of drug counseling. You know Mr Jones, Marijuana is the gateway drug to other harder more dangerous. Have a nice day"