The Pop vs. Soda Page | Social Studies Education | Scoop.it
A page that plots the geographic distribution of the terms "pop" and "soda" when used to describe carbonated beverages...

 

This is an old classic, but worth visiting when discussion regions diffusion and cultural identity.  This is a modern 'shibboleth' for the United States, a way to show where you are from to some extent.  What are other 'shibboleths' that make your region distinct?  


Via Seth Dixon