Persuasion Speech on Medical Marijuana

So its the end of my senior year and were ending English off with speeches. First was an informative now its an "actuation" (persuasion) speech. I finally convinced my teacher to let me do my speech on why medical marijuana should be legalized. Of course she said don't say anything that shouldn't be said, etc. This made me pretty happy because I'm actually going to put much more effort into it than if I was doing "why to go to college" like I would have done.

If anyone has any good sites or anything that would be great. Im going to look for amsterdamages long list so no need for someone to post that.