"They are biting kids and staff. Throwing things, from chairs to books. If anyone looks at them sidewards, then punching. You've also got to remember that these teachers have 25 other children in that class." One child had threatened to kill a principal, he said.
The additional $129,000 of Government money given recently to keep the beleaguered Whangaruru charter school afloat could have funded more than 7000 hours of support for high-needs pupils in Northland, Mr Newman said.
"Don't tell me there is no money available, it's obviously there when it suits."
In answer to why he thought violence was worsening, Mr Newman said the "cold hard reality" was that it often stemmed from poverty and home environments.
Ministry of Education head of sector enablement and support Katrina Casey said that the ministry would be talking with local principals about their concerns.
"We fund special education services in Northland at a higher rate than other parts of the country because we know schools and families there face particular issues," she said.