I like to tell jokes in class. My favourite question, when I finish explaining a particularly difficult concept, is:
"Any questions, concerns, complaints, confusions, uncertainties, anxieties or other general inquiries? Any good jokes?"
It lightens the atmosphere and seems to make my students relax and learn better. I'm not the only one who thinks so.
Anyway, I told my students I had learned that "Laughter stimulates both sides of the brain to enhance learning." So if you get "that bad feeling in the pit of your stomach" while doing your homework or studying for a test take a Humour Break (Thanks to John Evans for the link) or watch a sitcom for half an hour. Longer than that would be procrastinating. -- There's a new link in the [Links] list on all the class blogs. ;-)