Severely crack down on any form of competition without official approval. If you see a competition that is not officially recognized, it is a folk competition, which will involve many students' experiences, but it will not help to improve their practical ability, or it is not in line with the school's education system, so this kind of quiz is not allowed, because there were many social types before, such as commercial sponsorship, such as bonuses.
Primary and secondary school students should look at their own achievements, not whether they participate in the corresponding competition, because the competition itself has become a type of competition, that is, the pursuit of perfection is no longer a test of one's level, because you can get 80 or 70 points in the school exam of 100, and the students' level will be reflected in the test paper. The school will use this level to distinguish how well you master your knowledge, but compete with it.
A normal competition is no problem and can play a positive guiding role in the development of students. However, when this kind of competition gradually becomes something that all students have to do, even when enrollment is linked, it is not normal. This goes beyond the significance of the existence of the competition, in order to let everyone have a good learning direction and master some extracurricular knowledge, rather than saying that extracurricular knowledge must be mastered. If everyone and students want to master these extracurricular knowledge, it is no longer true.
If you are a parent now, you want to treat these games rationally. If your children are interested in these aspects, you can get them involved and give them some support as much as you can. If your child is not interested in these things at all, you should not force your child to learn these things, because there are many olympiads. Students who got a fairly good ranking later reported that they actually hated this kind of behavior and didn't want to do any activities related to it in their lives.