Make sure that all your students know that, no matter what its form, all bullying is wrong and will not be tolerated.As part of efforts to deal with the issue, you should also continue to promote awareness about the school’s AUPs and ICT misuse sanctions.

There are a number of things you can drive home to your students too like teaching them about their rights and responsibilities online and making sure they are aware that the internet is not a private place.School stakeholders need to also promote the positive use of technology, discuss and inform your students about good netiquette and personal safety issues.

One other key message is to encourage a “telling” atmosphere – so that pupils will report cyberbullying where they see it. To do this, your school can publicise different ways of reporting cyberbullying to give confidence to bystanders.Anti-bullying policies also need to be constantly updated and amended to deal with cyberbullying as it evolves. This will provide your school with some solid ground in terms of investigations and sanctions.

But most of all, you should encourage students to make friends and promote a positive and supportive atmosphere in the school which will ensure that cyberbullying does not thrive. Use our roleplays to open up a discussion about cyberbullying and imaging sharing.

Children and young people can be groomed online or face-to-face, by a stranger or by someone they know - for example a family member, friend or professional.

Groomers may be male or female. They could be any age.

Name calling ,taunting ,rumour-mongering ,imitating online, using their log-on details to affect the victim, leading to emotional distress are evident signs of dealing and being exposed to cyber bullying.
Schools deal with C.B. through anti-bullying policies and procedures by reassuring and supporting the bullied person, helping the child to gather information by educating him on how to protect himself from future attacks(new password, blocking profiles on apps. etc).
Advising not to reply to the abuser, by keeping his personal private information in place.
By investigating the claims brought up and report to the websites, phone provides in order to stop that happening again.
School guidelines like Acceptable Use policy, Anti-bulling ,Behaviour and Disciplinary policy should be in place .
Furthermore school should bring to everyone attention that bulling is wrong, raising awareness by teaching  them about the internet safety, encouraging to report cyberbullying where/when they see it/hear it.
As well a good behaviour management must be promoted.     https://www.webwise.ie/teachers/dealing-with-cyberbullying-in-schools-2/