This was a fun day in class. I told my students there had been a zombie outbreak and the military was working fast to contain it.
I provided them this handout that showed a world map with the "infection rate" listed as exponents for 10 major cities. Students were responsible for calculating the infection rate and then listing them from greatest to least. We had a lot of fun with this modern theme of a traditional practice.
.zip file includes .doc and .pdf, as well as answer key.