Using a backchannel...According to Wikipedia is "the practice of using networked [[/wiki/Computer|computers]]to maintain a real-time online conversation alongside the primary group activity or live spoken remarks....The term "backchannel" generally refers to online conversation about the topic or the speaker.

Grade 7 11-1-12 Backchannel:

Lessons to build student-to-student discussion


Supporting Text with Talk - Conversational Moves for Teachers and Students


Lessons for Teaching Comprehension and Collaboration in Text Discussion/Literature Discussion