How do you deal with disrespectful and mean kids in Poland? Do you reward them for this behavior? Do you tell them: Good job as long as you learn your abc?
No, they are punished but they don't give a shit. They go to school not because they want to but because they have to. Being at school is in itself a punishment for them so they don't care about additional punishments. Such kids are the most difficult to deal with. They are a pain in the ass. It's different with kids who misbehave but are willing to learn or at least care for their marks. Then, you can strike a deal with them, encourage them, reinforce their motivation and cater to their interests.
It's also easier if the parents and teachers cooperate with each other, but it's no always so. Many children who cause troubles at school also cause troubles at home. Sometimes, they come from pathological families or their parents are often helpless how to deal with their children's bad behavior.
It's a problem of every country and one of the reasons for me leaving school. Not everybody is fit to be a teacher as not everybody is fit to be a parent. However, a teacher has to cope with a multitude of children, not one, two or three. And teachers are also expected to help the parents to bring up their children, not only educate them. And it's easier said than done. There are many books, discussions and TV programs about how to deal with children's aggression, how to resolve conflicts, how to cope with emotional harassment but when you are confronted with a real situation, you often realize all these advices and ready-made solutions are useless.