Most students also report hearing negative comments about immigration, housing and gender roles.
Nearly two-thirds of children have come across extremist views online.
That's according to a new study from the Children’s Ombudsman, which shows 6 per cent of 600 students have seen these views in real life.
Most students also report hearing negative comments about immigration, housing and gender roles.
Cyber Safe Kids is calling on the Government to tackle the issue.
Ombudsman, Dr Niall Muldoon, says parents also have a big role to play in this.

Kfm Obituary Notices
Sharp Rise In M9 Collisions With Garda Call-Outs Up Year-On-Year
Councillor Seeks Clarity On How Often Nightclubs and Late Bars In Naas Are Inspected For Fire Risks
Unpaid Eight-Month Work And Training Placement For Adults With Disabilities Branded "Extremely Unfair"
Department Of Education Defends Kildare SNA Cuts Amid Claims Of Reduced Need At Some Schools
Naas Nurses Threaten Escalation As Staffing Row Deepens
Driving Tests Face Disruption As RSA Testers To Strike Next Week