University of California
University of California Berkeley: Teaching Discussion [Pdf]
A guide for instructors on how to engage students actively in discussions. SL.9-10.1 Discussion, SL.9-10.1b Group Rules, SL.9-10.1d Possitive Communication Stratagies, SL.11-12.1 Discussion, SL.11-12.1d Resolve/Synthesize
University of Colorado
University of Colorado: Active Listening
The site descibes what active listening is and provides some links for further study.
Lumen Learning
Lumen: Boundless Communications: Working in Groups
A lesson on leadership styles and responsibilities of working in groups.