Teacher, teaching for a living. This occupation is one of the oldest occupations in human society. In accordance with laws, regulations and industry norms, students are arranged to sit down, distribute study materials, prepare lessons and give lectures, correct homework, guide and help students to study, organize lectures and practice, organize examinations, impart basic knowledge of science and culture, carry out academic exchanges, improve students' comprehensive practical abilities such as observation, study, memory and cognition, hands-on communication and operation, cultivate students' specialties, and promote morality, intelligence, physique and beauty. Entrusted by the society, he carries out special and constructive education for the educated, implements various educational policies, maintains social stability, and trains all kinds of high-quality or practical talents for the country and society. In social development, teachers are the inheritors and disseminators of human culture and scientific knowledge. For students, it is also the developer of students' intelligence and the shaper of their personality. Therefore, people regard it as "the project of human soul"

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The lofty title of "teacher" is for people's teachers. In the process of education, teachers play a leading role. He is an educator, leader and organizer of students' physical and mental development. The quality of teachers' work is related to the physical and mental development level of the younger generation and the improvement of national quality, thus affecting the rise and fall of the country.

Experts refer to people with special skills or comprehensive professional knowledge in academic and technical fields; Highly successful professionals who are particularly proficient in a certain subject or skill.