Learning Management in the Classroom

I was wondering what, if any learning management systems people used.  Do you use these to communicate with your students? Create lessons? Share files? Grade posting? Group work? Forums?
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Moodle

Submitted by lnitsche on Tue, 2007-08-07 14:18.

Good point about files.  My district will be instituting Moodle across the district this year. 

Any sugestions for introducing it to elementary teachers who are completely new to CMS's, blogs, wikis, etc?

I've been given an hour to introduce it to third through sixth grade teachers who will not have computers in front of them.  Rather daunting!