Charlie Fitzpatrick wrote a blog on how to use AEJEE software to analyze county population change between 2000 and 2005, on: http://blogs.esri.com/Info/blogs/gisedcom/archive/2008/03/24/exploring-pop-change-with-aejee.aspx Using a simple county query that your students could do, he found that 1,147 counties lost population. Ask the students ...