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Facebook will team up with Childnet & the Diana Award to train and empower young people to combat cyber bullying.
Facebook says tens of thousands of children in secondary schools will be taught how to counter cyber bullying by the social network.
The company is investing £1 million in helping pupils in UK secondary schools to become "digital safety ambassadors" - young people trained on how to counter online abuse.
Facebook lets anybody aged 13 or over to have a Facebook or Instagram account, but up to one in four children have experienced online bullying, according to the UK Council for Child Internet Safety estimates.
Facebook says it is providing online help on how to combat cyber bullying, and funding youth charities to carry out face-to-face training in classrooms. It has partnered with the Diana Award, an anti-bullying charity set up in memory of Diana, Princess of Wales, and Childnet International.
The social network's head of safety Antigone Davis said: "Over the last decade, we have developed a wealth of innovative resources on Facebook that enable young people to look after themselves and their peers, from our updated Safety Centre, to our online reporting tools. By offering trained digital safety ambassadors to every UK secondary school we are now taking this commitment offline too."
The company says it wants trained pupils in every school, ultimately meaning tens of thousands will be taught.
More information about cyber bullying can be found here.