A place, usually an institution or run-down shack, that teaches young and aspiring potsmokers how to get high.
Such teachings include how to properly roll a joint, inhaling and exhaling practices, good quality versus bad quality pot, ideal places to smoke, and how to cover up evidence that someone has smoked pot. Usually, if one were to pass all classes and graduate, all graduates receive one free pound of cannibus as a going away gift.
"Hey, you wanna go to the beach with us tonight?"
"Naw, thanks dude. I got High School tomorrow. I need to stay home and practice rolling this joint. We're having a test."