I saw this article and thought it might be of benefit to us as we continue to use collaborative activities in our classrooms. Let me know what you think about the concepts and practices.
http://www.tcrecord.org/Content.asp?ContentID=16178
A Dialogic Inquiry Approach to Working With Teachers in Developing Classroom Dialogue
Teacher’s College
by Sara Hennessy, Neil Mercer & Paul Warwick � 2011