lol just imagine kids on acid at school. On the other hand that is one of the good drugs unlike heroin and meth. Weed is ok with me, dosen't rlly hurt anybody.
Drugs will always be sold everywhere, nothing to do about that except make them legal.
The best way to prevent people from dealing (including school) is to make drugs legal and control the environment in which they're getting produced & sold.
It's also the best way to educate people about it and propose solutions & help for people having addiction issues.
Drugs are just like anything else, using in excess is bad, using for the wrong reasons is bad etc...