A closed book is an exam that the teacher invigilated when you were at school. The examination room is closed, so you can't bring any materials or make copies.

Open-book examination and closed-book examination have their own advantages and disadvantages. For some classes, opening books can get unexpected results, because students can look through books to find information, so they have no psychological pressure and can think freely and deeply, so that students can learn how to think without memorizing some conceptual things. Because there is no standard answer, there will be no cheating. Everyone can give full play to their imagination and rely on it through in-depth thinking. It is also conducive to stimulating students to take the initiative to learn, so as to cultivate their own unique learning methods and ways of thinking, rather than blindly studying for exams. If you study blindly for the exam, the result will not be good. ?

However, everything has two sides, and the open-book exam also has its bad side. Sometimes the open-book exam is not used well, so don't use it when you open the book, such as some memory courses such as law department and some courses of economics. Some students will be encouraged not to study hard at ordinary times and plagiarize a lot during the open-book exam. On the surface, they did well in the exam, but in fact, many things were not really mastered, and in the end they could only harm themselves. ?

The advantage of closed-book examination is that it can encourage students to study hard at ordinary times and listen carefully in class. They must memorize what they should remember and can't be lazy. They should be able to study without books and consciously form a good habit of studying hard. In closed-book exams, the results are often more realistic. However, the disadvantage is that some students are under great psychological pressure, and some students who don't study well always want to cheat, but most students just cram for exams to get high marks, don't know much, and don't master knowledge fundamentally. What's more, I haven't learned the most important thing-to learn to think independently and form my own things. The questions that can be answered are limited to the questions in the textbook. If the questions are different from those in the textbook, these students can also answer them, but only by rote. ?

In my opinion, opening and closing books have their own advantages and disadvantages, and the key is to use them well. For some things that students need to remember, it is better to use closed-book exams. For students who need to focus on understanding and flexible use, it is best to use open-book exams. Only in this way, students can really master the knowledge without increasing the burden, so that the knowledge they have learned can be deepened and applied flexibly, and the purpose of the examination can be truly achieved.