In my hunt for things to incorporate in a lecture later today, I came across this great video (Ma and Pa Kettle) on the mathematics divide.
In the end, I won't actually be using it, but hey, I wonder if it also feels about right to those continually addressing the skeptics.
I'm using that in my thesis defense. Don't try to stop me.
In that case, you can get a downloadable high res version at this link:
http://www.math.harvard.edu/~knill/mathmovies/swf/maandpakettleaddition…
I love that. Just love it.