http://www.pbs.org/wgbh/pages/frontline/meth/
PBS had a good show on meth, and having kids watch that would do more than a few commercials. PBS explained why people do it and ow it effects the brain. At the sme time showing photos of people when they started meth and a few years later.
I actually didn't know what meth was until I was 20 and a girl in my college chemistry class said she had been addicted for 3 years and clean for 2. And I asked "What's meth?" I led a sheltered life growing up.