I just got suspended form school because of weed. Read my thread. It might help.

I was smoking after school and a teacher saw me. I still got suspended. And i wasnt even on school property.

If you are trying to help your parents understand, you need to be informed. You need to know facts and sound smart about it. Also tell them you have no intrest in other drugs and that you have been offered them but refused. It told my grandma that and that made her a little more understanding.