His Erdos number is 0. Erdos's co-authors have Erdos number 1. Abstract numbers are the product of a long cultural evolution. They also apparently played a crucial role in the development of writing in the Middle East. A lecture to Devlin's readers with good advice on how to write math clearly enough and other important things to do to get an article published in the newspapers.
Articles are available in both on-line and downloadable versions.
A page of math humor, including definitions, anecdotes, math education jokes, theorems, puns, limerics, and links. A book and core-course at Montana State University. Site provides a description of the philosophy behind the book, the methods used in the book and course, research results from studies of both, and information on ordering the book. MN LEGO Logo projects are integrated into the science and computer curriculum of the Blake School. NASA Dryden Flight Research Center Lesson plans based on aeronautical themes and NASA projects.