HERE'S a GOOD ONE!!!
Persuade them to sign a petition banning dihydrogen monoxide. Tell them you wanted to do something meaningful for your speech and are going to forward the petition to the national organization.
there's a great site for all the info you'd need:
here
examples:
Dihydrogen Monoxide (hereafter referred to as DHMO, but also called hydrogen hydroxide,...)
DHMO is a *major* component of acid rain.
DHMO has been found in ground water, streams, lakes, and the ocean.
DHMO has caused death within minutes for many people who have inhaled it
DHMO is used heavily by the plastics industries and other chemical industries, excess DMHO is often disposed of by releasing it into streams, rivers, or lakes
DHMO is used by nuclear plants
DHMO causes erosion problems
etc. See the site.
edit: if they sign the petition, you deserve an A+
If the teacher signs the petition, you deserve an A+ for the class, not just the project.
I actually thought this joke was relatively well known, but no one in my physics or calculus classes recognized it.
DHMO is none other than H2O (water)