Listen to each page (first a child, then the teacher), and then bring to the confrontation. You can ask, that the educator would be at this conversation.
♦ Nie wypowiadaj nauczycielowi otwartej wojny, do not threaten, No scare, Because this will not resolve the conflict. But don't tell your opening on his side either. The child must feel the understanding and support of parents.
♦ Spytaj nauczyciela, what a way out of this situation sees, Say, that you ask him for advice, Let him feel, that you are not his enemy. If that doesn't help, Ask for the help of a director or school teacher.