Hello. You did not provide the instructions and showed the text to which this question refers, which makes it impossible for it to be answered accurately. However, I will try to help you.
If children need school instructions on how to behave in the presence of a visitor, it probably means that these children have very socially marginalized families, who do not get enough knowledge to promote a behavioral education for their children, as they have had few opportunities to learn this type of education.
