I asked that as students critiqued their Altered Books that the artist would lead the discussion. My 3D Art class handled this incredibly well. In the past I have found that I speak more than I should. The students are more than capable at leading a discussion. I found that they actually had more relevant points and gave each other a better critique than I alone was capable of.
I have shared a video of highlights from the critiques as well as photos of the works.