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University of Colorado
University of Colorado: Core Conflict Problems and Negotiation
Site contains a wealth of information on conflict, negotiation, interpersonal relationships, communication, and more. Spends considerable time with "complicating factors" in communication.
Other
Cooperative Communcation Skills: Emergency Kit [Pdf]
This site is provided for by Cooperative Communication Skills. Seven suggestions for resolving or refusing conflict before it gets out of hand. SL.9-10.1c Active Participation. CCSS.ELA-Literacy.CCRA.SL.1, SL.11-12.1c Questions/Part