The reason why most teachers choose the mid-term exam is to understand the learning quality of students during this period. Through the examination, we can clearly see the common problems of the students, such as which chapter is difficult for everyone to master well and which content is closely related to the subsequent knowledge but has not attracted attention. Similar problems can also be reflected in the test paper. Through this information, the teacher can modify the later teaching plan for everyone to ensure that everyone can master this course to the greatest extent.

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The mid-term exam teacher may not take the time to review alone, so it is necessary to find the previous senior sister after class, seek some review materials, and systematically review the previous chapters. Review textbook knowledge, no matter how to find review materials, we must make textbooks transparent and efficient.

However, there are also many people who are free and handsome and don't care about the existence of the mid-term exam. Naturally, a very small proportion of the total score will not be taken care of by them. Other people's review is "checking for leaks and filling gaps", while this kind of person's review is "goddess mending the sky". Later, I found that it didn't help at all, so I simply gave up. Teachers generally don't repeat grades anyway.