http://www.mwac.nps.gov/libi/
Archeology at the battle of the Little Big Horn
http://kids.state.mt.us/db_engine/presentations/presentation.asp?pid=184&sub=Wahkpa+Chu+gun+Archaeology+Site
The Wahkpa Chu'gun Archeology web site for kids
http://www.nps.gov/yell/history/archeology/index.html
Archeology in Yellowstone National Park
http://www.passportintime.com/
Volunteer opportunities with the National Forest Service's Passport In Time projects
http://www.his.state.mt.us/departments/education/edu_onlinecurriculum.html
Montana Archeology Education Resource Catalog for Teachers
The contents page is full of  information
http://www.uiowa.edu/~osa/nasa/in/montana.html
http://www.his.state.mt.us/
Contact information for the state archeologist