A third of parents admit they rarely, if ever, check their child's online activity despite one in six children saying they have been the victim of cyber-bullies.
A new survey, carried out by the National Association of Principals and Deputy Principals (NAPD) and published today, found that fewer parents are checking their child's online behaviour, which could lead to an increase in cyber-bullying or young people accessing inappropriate material.
Just 46pc of parents said they checked what their child does online each week, down from 54pc a year ago. Thirty percent of parents said they check their children's online activities infrequently or never.
This is despite one in six children surveyed saying they were cyber-bullied, while one in 20 has admitted they were a perpetrator.
There has also been a decrease in the number of parents who believe their child has been cyber-bullied, down from 18pc in 2013 to 10pc in 2015.
Only 4pc said their child has been the perpetrator of cyber-bullying.
Speaking at the launch of the ISPCC's anti-bullying 'Shield my School' initiative, director of NAPD Clive Byrne said: "While the drop in the number of parents who check their child's online activity frequently may suggest parents believe cyber-bullying isn't as much a problem as it used to be, the statistics tell another story.
"One in six children say they have been cyber-bullied and we urge parents to remain vigilant," said Mr Byrne.