Writings for a General Audience

These are largely aimed at an undergraduate mathematics major, though that is not to say that you must be one to get anything out of them.

Notes on Mathematics of Voting Methods, based on Donald Saari's excellent book (Winter 2004, and Spring 2007)
What Makes Fermat's Theorem So Hard, Anyway? (Fall 2005)
No Cell Phone Signal? Algebraic Topoogy to the Rescue! (Hudson River Undergraduate Mathematics Conference, Spring 2009)
Fractals, Pascal's Triangle, and the p-adic Numbers (Spring 2009)
Airplane Passenger Seating Problem (2009)