A national campaign to tackle bad behaviour in schools has been suggested, with some parents showing "defiance" to policies and excusing the actions of their children, according to Estyn.
Wales' schools inspectorate said since the pandemic, secondary schools have reported a general decline in behaviour, with the most challenging pupils becoming "increasingly hard to manage".
It called for a national campaign to address the issues, with fixed term exclusions of five days or less rising from 12,774 instances in 2018-19 to 22,945 in 2022-23.
The Welsh government said it would ensure "everything possible" was done to address declining behaviour in schools and colleges.