The union representing secondary-school teachers has insisted they are doing everything they can to tackle cyberbullying — but admits the issue is almost impossible to stamp out.

“Social media. It’s second nature to us. It’s massive. It’s everywhere. It’s at home, on the way to school, in class, at dinner, in bed,” one of the 16-year-old girls we interviewed said.

IF you want a crash course in cyberbullying, log on to the Askfm website.