persecuting children 3 aggressiveness 2 elementary schools 2 schools 2 aggressiveness in children 1 aggression 1 more ... bullying 1 dětská agresivita 1 group behavior 1 criminality 1 násilí ve škole 1 educational psychology 1 child behaviour disorders 1 prevence (sociální problémy) 1 prevention (social problems) 1 problem child 1 problem student 1 risk behavior 1 rizikové chování 1 school psychology 1 school violence 1 skupinové chování 1 social problems 1 šikana 1 school environment 1 školní psychologie 1 less ...