Body language is a form of nonverbal communication, which conveys information through body movements, facial expressions and postures. In the field of education, teachers can communicate with students better by using body language and enhance teaching effect. Among them, sign language is one of the most commonly used body languages for teachers.

Teachers frequently use sign language because it is intuitive, concise and clear. Sign language can transmit information quickly, and at the same time, it can cooperate with spoken language, making the information more accurate and clear for students. In addition, sign language can also express teachers' feelings, attitudes and intentions, thus enhancing interaction with students.

For example, when a teacher explains an important concept, he can draw a picture of the concept in the air with his fingers, or draw a related schematic diagram on the blackboard. This can help students better understand this concept, but also help students remember this concept more deeply.

In addition, teachers can emphasize the importance of some important contents by gestures when explaining them. For example, when the teacher says "very important", you can cross your hands on your chest or raise your arms to make students feel the importance of these contents.

Besides conveying information, sign language can also express teachers' emotions and attitudes. When teachers praise, encourage or support students, they can express their feelings and attitudes through gestures. For example, when a teacher sees that a student has answered a question correctly, he can give a thumb or pat the student on the shoulder to express his praise and encouragement. These gestures can strengthen the emotional connection between teachers and students, thus better promoting the teaching effect.

In short, teachers frequently use sign language because it is intuitive, concise and clear. Through the cooperation of sign language and spoken language, teachers can better convey information, express emotions and attitudes, and thus enhance the teaching effect. Therefore, teachers should pay attention to learning and mastering some commonly used sign language in order to communicate with students better.