Education and Training Act 2020, s 98; Summary Offences Act 1981, s 9
All physical punishments are against the law. This includes any and all punishment involving physical force, like hitting or slapping you, or using a strap or cane, or throwing things at you like pens or whiteboard erasers.
Any deliberate use of force, or attempted force, against you could be an assault and therefore could justify making a criminal complaint to the police, even if you’re not hurt.
If you have been injured, your whānau should promptly take you to a doctor for a medical certificate. This can be used as part of a complaint to the school, or as evidence if the police decide to charge the teacher.