Jigsaw group learning of four stock characters, come back together to share (you can do this with more characters, I just find four groups has been about the right breakdown for me)
National Theatre Commedia Videos on Stock Characters, Shape and physicality (there are others as well, they're all really good!)
Stock Characters: http://www.youtube.com/watch?v=h_0TAXWt8hY, start at 1:00, then skip from 3:00-7:00 and show rest)
Shape and physicality: https://www.youtube.com/watch?v=JJEwuurzDe4
Lazzi – warm up with A Sneeze! (yes, I see the irony), then the practice scenarios from the attached study guide
Student assignment: Take on the physicality of your assigned commedia d'ell arte character (from their jigsaw groups, I pair them with someone from another character group). Work with your scene partner to create an improvisation around the following scenarios, using only gibberish dialogue.
Can do the Two-person, two minute improvs to expand this (same attached study guide)