A new report also shows students believe more teacher involvement is needed to stop bullying.
A teaching union says smaller classes are needed to introduce the support students need.
A new report from the Ombudsman for Children shows over a third of teens say they don't feel their teachers listen to them or their opinions.
Over 1,000 12 -18 year olds took part, with almost half saying more teacher involvement is needed to stop bullying.
General Secretary of the Teachers Union of Ireland, Tullamore's Michael Gillespie, says smaller classes is the only way to introduce supports students need: