I ran across this site and it's pretty neat.

With the support of the Institute of Museum and Library Services
<http://www.imls.gov> and in collaboration with Minnesota's Land
Management Information Center <http://www.lmic.state.mn.us/>, the
Minnesota Historical Society has created True North: Mapping Minnesota's
History to provide Minnesota's teachers with the knowledge, curriculum,
and tools to teach the state's new graduation standards for geography
and history, using online digital resources and applications.

http://www.lmic.state.mn.us/ghol/Maps.php


Angie