Here's another interesting web site sighting:
Direct Search-Campaign 2000.
A George Washington University librarian has gathered a URL for each state's election information website and put these URLs on one webpage. If the state also has a searchable campaign finance database, he's included a link to that, too. If you have any questions, please contact the author, Gary Price. His information is on the webpage.
I didn't try any searches, so I won't endorse the product. But maybe you will find it useful as you gear up for election activities in your schools.