Long-time JAGIS-L friend George Dailey, ESRI's K-12 Education Program
manager, contributes a fine, basic article to the current issue of
ArcUser on how to normalize census data. It's would make an
especially good handout to have while teaching.
See "Normalizing Census Data Using ArcMap" at
http://www.esri.com/news/arcuser/0206/files/normalize2.pdf
-tj