As a follow-up to my post on accountable talk, here is a link to a “videopaper” entitled Encouraging Mathematical Thinking from The Math Forum @ Drexel University. Although it revolves around research done with secondary students, the information in the paper is certainly relevant to elementary mathematics classrooms. Interspersed in the paper are short video clips (QuickTime required for viewing) that allow you to see some of the ideas at work in the classroom.
If you haven’t visited The Math Forum, it is definitely worthwhile – lots of great resources, lesson plan ideas, research, etc. This particular videopaper is part of the Bridging Research and Practice project, a group of researchers with classroom experience who seek to link the best in research with practical application in the classroom.