Use of body language includes observing pupils' posture, gestures, mannerisms, facial expressions, speech and tone, in order to establish their emotional state and help build trust and rapport.
Your body language has a strong impression on students. Therefore, teachers should use it to their advantage. Non-verbal communication is rarely taught in teacher training programs. However, body language and the tone of your voice are major factors in communicating and thus teaching.
Teachers are aware of this important fact that students can read us. We need to listen to our students body language as well.