nonverbal cues
It is vitaly important to continually read student NV cues in order to test comprehension and interest during a lecture.
Reading eyebrows, lip arrangements, hands on the chin or on the side of the face, all of this is saying sommething,,we have to figure it out,, in general I notice similarities in the uses and the cultural groups, but I offer have to inquire with an outside source of my NV's having a different meaning in a different cultural