I went to a high school that served a big area, low population county. It was on a hill across the river from the grade school, where the bus garage was. They only wanted to run one bus to...oh, say Santa*, so everyone who lived out there caught one of the express buses to the elementary school then changed buses.
The kids who smoked weed did it under the bleachers in Central Park.
School let out at 3:15.
The bus left school at 3:50.
It arrived at the garage at 4:15.
And it was a five minute walk to the bleachers.
One of my high school teachers got busted for growing weed in his front window. The case got thrown out of court because the sheriff was too stupid to send a sample to the police lab in Boise before the trial and, since he hadn't been to drug identification training, he wasn't legally entitled to identify pot plants. After the acquittal, he taught in that district for 10 more years.
(Oh yeah...the Santa story...it's a tiny hamlet that gets huge from Black Friday to Christmas; everyone mails Christmas cards from there for the postmark.)