Magdalene - are you familiar with the Intel Teach Elements Series? These are a series of courses for educators to explore concepts associated with 21st century teaching.
In Module 4 of the Collaboration in the Digital Classroom course there are strategies regarding effective communication. I wonder if this Module has some resources that you would find helpful.
In the Project-Based Approaches course there are several activities that revolved around questioning and by using good questioning techniques educators can get better feedback and answers from participants.
By reviewing these coruses you might find some ideas and stratigies that you are looking for.