1.  What warning does Harvard substance abuse researcher Kim Harris give to students when she speaks about drug use?

2.  What concerns have been raised about states legalizing the sale of marijuana for medical purposes? Be specific.

3.  What have recent studies found about the effect of marijuana use on teens?

4.  What part of the brain does regular marijuana use affect in teens?

5.  a) How have teen attitudes toward the dangers of marijuana use changed from the 1980s-'90s to 2011?
b)  What does Dr. John Knight blame for the shift in attitude among teens about marijuana use?

6.  a) How effective do you think teaching teens about the effects of marijuana use on brain development will be in reducing the number of teens who begin using marijuana, or who are already using it?  Explain your answer.
b)  Ask a parent the same question.  Do you have the same reaction?  Why do you think this is so?