In the daytime period, I told my students that "if you keep me stay away from trouble, I will also keep you from trouble."

However, the Chinese teacher who was havtaking night class told me that a few students asked to go toilet in turn, which was very suspicious.

Furthermore, quite a few students changed theire seats without approval.

What's worse, aone boy often went through the teachers' desk to throw rubbish.

I am not sure whether "through" is the best word here. Perhaps you mean "past" or maybe "over"?

She regarded thim ws behaviour as challenging her pricipleauthority.

Then I went to the classroom, but stayed atin the corrideor to hear who was talking.

I knew ithat what I was hearing was quite a bad behaviour, but I had no idea what to do.

I heard that there werecould make out three obvious voices, and I knew whose they were.

So I went into the classroom and asked the talkers to stand up conciously.

I'm not sure what you wish to express by the word "conciously". Perhaps you mean "at once". By the way, the word "conciously" is spelt "consciously".

However, all the students quickly became quiet quickly and no one answered.

I talkangrily shouted loudt three names angrily and asked themof three people and told those people to go to the office with me.

By the way, your phrase "I angrily talked loud..." should be "I angrily talked loudly..." When you are describing a verb (here the verb is "talked"), you need to use an adverb. The correct adverb here would be "loudly" not "loud". "Loud" is an adjective, and adjectives describe only nouns, not verbs.
The loud boy. (adjective describing the noun, "boy")
The boy talked loudly. (adverb describing how the boy talked, "loudly")

I got angrier because it sounded like I was insulting them.

This is ok. However, it is a good idea to try to use a word other than "got". You could use "became".

Otherwise, I smelled the smoke smell from aIn addition, I could smell cigarette smoke from one of the boys.

I asked him that whether he also had smoked, but he denied this.

I asked him to look at myme in the eyes and tell me that he never did itsmoked, but he couldn't.

In the daytime period, it was him as wellalso him that he asked me not to posedt my Wechat Moments all in English.

"it was him" is informal English for "it was he", but most people use the informal form in everyday English, and that is ok.