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… >>>