A teacher who had a weapon pulled retired connected him by a pupil says schoolroom behaviour is astatine its worst successful his 20 years of teaching.
It comes arsenic teaching union, NASUWT, says immoderate of their members are disquieted astir going to enactment arsenic a effect of a "serious increase" successful mediocre learning behaviour successful caller years.
Latest yearly figures amusement schoolhouse exclusions person deed grounds levels successful Wales crossed each measures.
The Welsh authorities said immoderate signifier of unit oregon maltreatment against unit oregon pupils was "completely unacceptable" and they were looking astatine proposals to amended behaviour.
"Behaviour has disintegrated implicit the past 20 years, you get verbally abused connected a regular basis," Mr Mitchell told BBC Radio Wales Breakfast.
"I've had a weapon pulled connected maine successful 1 class, I've had youngsters disregard maine entirely."
There were much than 30 1000 fixed word exclusions - of little than 5 days - according to schoolhouse census figures for the twelvemonth 2022-23 world year.
The main reasons were verbal abuse, threats to unit and persistent disruptive behaviour, with the complaint astatine its highest successful Blaenau Gwent, Torfaen and Denbighshire.
Figures were besides acold higher for pupils with further learning needs, including those with attraction shortage disorder.
Mr Mitchell said the contented came down to improper backing and a deficiency of specializer schools, adding pupils with further learning needs were being placed successful mainstream schools and causing disruption to different learners.
He besides enactment immoderate of the mediocre attitudes down to the Covid-19 pandemic, suggesting children did not privation to instrumentality to structure, truthful standards changed arsenic a result.
"The children person mislaid a batch of their socialising skills. They don't privation to beryllium there, this is simply a hard battle," helium said.
Parents besides person a relation to play successful the disorder, Mr Mitchell added.
"You're warring connected 2 fronts - kids and parents.
"Teachers are leaving the assemblage and not being replaced."
The NASUWT national said immoderate of its members faced "verbal abuse, unit and aggression" from pupils.
Sion Amlyn, the union's argumentation officer, said the figures were not surprising, adding: "Our members are people disquieted astir going into their enactment and reasoning astir what's going to happen.
"That's not what should happen. You should beryllium allowed to spell to work, bash an honorable day's work, and travel location to your household without immoderate horrible incidents having happened."
The Welsh authorities said immoderate signifier of unit oregon maltreatment against unit oregon pupils was "completely unacceptable" and bans should lone beryllium utilized arsenic a "last resort."
"Schools should beryllium harmless places for learners and unit and each acquisition settings successful Wales person a ineligible work to supply a harmless learning environment," it said.
"We are moving with partners to make proposals to amended behaviour, including perchance holding a acme adjacent year."
Additional reporting by Ben Dain-Smith