Juggalo is on the right track. If they hit you with their just say no pamphlets fight back with real knowlege. Let them know where you stand.
and being underage, living with your folks....just fucking lie.
I fucking lied all through school to my parents, I still would fucking lie if they asked me about smoking weed. I don't lie to anyone else though. I lie to my parents because I don't want them to worry about me, they don't need too. They want you to make good decisions, they want you to choose what they would choose for you. Just smile and nod, you will get through this.