It's a terrible school, I don't advise you to send your children there.
Teachers are very biased. Grades do not depend on the student's knowledge, but on the teacher and his attitude towards him.
The child's personality is simply killed and not allowed to develop fully.
Attitudes towards weaker children, let them pull up the weak, and not only deal with excellent students, there is no need for more intelligence here. And by pulling the weak ones, they will prove that they are worthy of a score of 5.