First of all, compared with other occupations, especially those working in off-campus institutions, teachers' salaries are very low. If people devote themselves to being teachers and make a living on teachers' salaries, it is difficult to improve their living standards. Moreover, with the continuous development of social economy and rising prices, it is difficult for teachers' salaries to support a family's living expenses. So now many people choose to work in off-campus training institutions. Although the work intensity will be greater than that of being a teacher, his salary is very high. Some people work in an off-campus training institution for one day, which is equivalent to the salary of a teacher working in a school for one week. So now many people would rather work in an off-campus training institution than be a teacher.
Another reason is that the enrollment quota is relatively small. If he is a school teacher, but he doesn't attend school, then he doesn't enjoy the national salary and welfare, and his status is only a substitute teacher of the school. His salary is extremely low, and there is no formal teacher welfare on Teacher's Day and Mid-Autumn Festival, so in the face of this situation, many people work in institutions outside the school. Because even without benefits, his source of salary is not worrying. Nowadays, more and more parents send their children to tutoring institutions outside the school to help with their homework.
So to sum up the above reasons, some people would rather work in an off-campus institution than be a teacher.