Teachers and principals around Aotearoa are doing it tough in the classroom as they struggle with changing and worsening student behaviour.

An Education Review Office report says disruptive and violent behaviour in schools has reached critical levels, with teachers reporting daily instances of fighting, abuse and vandalism.

It says up to 50 percent of teachers cite rising violence as a reason why they would consider leaving the profession.

It's calling for national action and a co-ordinated approach to try and rein in the growing tide of disruptive behaviour.

The Education Minister Erica Stanford turned down a request to come on the programme.

Marlborough Boys High School tumuaki principal John Kendal spoke to Charlotte Cook.