You can go to a place like Yahoo [http://www.yahoo.com/],
which has a list of listservs. On Web66 [http://web66.coled.umn.edu/],
if you go to the Mustang site [http://mustang.coled.umn.edu/],
one of the links has educational listservs. So an educator could
go there and find listservs that have to do with social studies,
or science, or math, or elementary, or special ed., or administration,
or whatever. There are directions on how to join the listserv when
you find that site.