[HUE]

It sounds like an interesting experiment, and one that would highlight to a class which refuses to (or half-heartedly) uses body language. Yet neither speaking nor body language is mutually exclusive of the other, I think. In conversation classes, it's always important to incorporate gestures, facial expressions, and changes in pitch and intonation to convey meaning. Obviously these are later steps in a lesson, but they can appear in a dialogue or role play to prevent students from reading like robots. Over time, and with progress through ability levels, my students' body language has become much more fluid and realistic.