I don't know if you have any invigilation experience. Actually, I was an invigilator. If I have to evaluate the invigilator, I feel very uncomfortable. The main reasons are as follows.
First of all, it takes a long time to be an invigilator. Some exams last two hours or more. You can't leave this classroom for two hours. Imagine how boring it is to stay in the classroom for two hours without anyone talking to you and playing with you.
Secondly, why do I feel that being an invigilator is a very bad experience? It is because the invigilator basically has nothing to do. But it's not as fun as everyone thinks. It seems that someone stole the examination paper. In fact, few people steal the exam. Basically, you have been sitting there for hours. No cell phones, no walking, no going out. I kept an eye on the students until the end of this time. It is more convenient for students to take exams, because they have to keep doing problems, so to some extent, time passes very quickly. But for the invigilator, there was no need to do anything yesterday, which would make him so bored.
In addition, I think the invigilator is not particularly good at doing it. Because first of all, you should manage the discipline in the examination room. Some children can be very naughty. At this time, you can only educate him not to disturb other children. This kind of day is very easy to handle, and some children will secretly read books and so on. You need to fight with them. Because to ensure the fairness of an exam, we must not let these students who steal the exam succeed.
Finally, there is another reason, because there are always many children who have to go to the toilet during the exam. You can't even let him go to the bathroom. You let him go to the bathroom and you're afraid he'll read the answer quietly. Therefore, invigilation is not an easy task.