Hi Craig! Thanks for your excellent example about moving around the class during your lecture; it really does help to keep a pulse on student understanding, and makes the class more personal and interactive as well. Sometimes, while moving around and during a presentation, I'll ask for a volunteer to paraphrase for the class the important concept or application that we are discussing at the moment; I've even given out small and funny prizes for those who volunteer to summarize for the class. Additionally, I sometimes stop during a lecture and ask students to write down a question about the topic or ask them to provide an example; it's easier to get the participation when you are in the learning space and not behind a podium (I actually had instructors in school that sat behind a desk and talked)! Thanks again, Jay Hollowell ED106 Facilitator