If the university has any objection to the results, it should ask the teacher how to send text messages.

First of all, you should show great respect to your teacher, such as' Hello, dear teacher'.

Secondly, it is necessary to introduce clearly who you are, which age, which major and which class you are in;

Third, explain that you are a diligent student, and then ask questions euphemistically, that is, you feel diligent, but you don't know why you didn't do well in this exam. I have checked it again and again myself, but I can't find the cause of the problem. Can the teacher tell you? In this way, we can find the crux of the problem, thus helping individuals to correct it in the next step of study.

Fourth, you should understand that you should go to the teacher for such a question, and ask the teacher face to face. It is impolite to send text messages. But I sent a text message because I was worried that the teacher was busy.