The common mistakes in the language of extra-curricular education mainly include rude language, inaccurate words, emotional out of control, indifference and so on.

In the current Chinese classroom teaching in middle schools, some teachers do not prepare enough lessons and have a weak grasp of the professional knowledge in the teaching materials, which leads to the nonstandard and inaccurate teaching language used in the classroom and makes it difficult to scrutinize it carefully. There are also some Chinese teachers who speak at an inappropriate speed, too fast and too slow, which all affect students' absorption of knowledge.

Some teachers have a lot of catchphrases in the process of giving lectures, and their colloquialism is serious, and the expression of knowledge points is very verbose, which makes students feel bored with the classroom and unwilling to take Chinese classes. Some teachers' Putonghua is not standard, and they have problems with pronunciation, so they can't play a good demonstration role for students.

There are also some teachers who are not very organized and often repeat and jump. All the above reasons may lead to the inefficiency of Chinese classroom and fail to achieve the expected results. Teachers' right to speak refers to teachers' right to speak. Naturally, there are terms that conform to the norms of the school, but at present, many teachers' terms are not standardized, and the language expression is not accurate enough or even lacks due restrictions.

Language violence or language hegemonism often occurs. For example, "you are an idiot, you are an idiot, you are sick" and so on. There are even acts of corporal punishment in disguised form and insulting classmates, which not only hurts students' self-esteem, but also has a bad influence on school civilization education. Language hegemonism is mainly manifested in the fact that many teachers are used to evaluating their classmates with their own ideas.

This classmate is good, but that classmate is not good or dominates the right to speak. For example, students' answers to questions in class are different from the teacher's purpose, and the teacher will forcibly interrupt the students' answers or say that the teacher takes up the monologue of the whole class, and the students have little or no participation.