This document discusses non-verbal communication and its key components. It describes various forms of non-verbal cues including facial expressions, gestures, eye contact, posture, tone of voice, and others. It provides examples of different non-verbal cues and their functions in communication, such as nodding to indicate yes, shrugging to express not knowing, and gestures being used to emphasize points. The document also provides tips for teachers on using effective non-verbal communication in the classroom, such as making eye contact, smiling, and gesturing to engage students and clearly communicate instructions and expectations.