DD (Y7) has had a few incidents with another girl being unpleasant to her and her friends. She told DD to fuck off, has formed a 'we hate <DD's friend>' club, etc. It's all fairly petty stuff and there's been nothing physical so I've told DD to just try and ignore. Does there come a point when I should tell DD to get a teacher involved though? She went in today and was really nervous about this girl :( But its not like primary where teachers can get involved in every little dispute... Where's the line at secondary?