If you want students to make their own tables, you can locate electronegativity data for the elements on many web sites (including the ones below), in a Chemical Rubber Company Handbook, or in some printed periodic tables.

Mendeleev's Periodic Table, 1869
Check out Mendeleev's original periodic table at this site:
http://chemlab.pc.maricopa.edu/periodic/foldedtable.html

EnvironmentalChemistry.com: Periodic Table of the Elements. Comprehensive data on elements including scores of properties, element names in many languages and most known nuclides is provided by this periodic table. In addition environmental and chemistry articles round out this site.
http://klbproductions.com/yogi/periodic/

WebElements:Visit WebElements, a site that claims to be the first periodic table on the WWW. This web site features a printable version of the periodic table.
http://www.webelements.com/webelements/scholar/