No there isn't Tony.
She would need to have a full teaching qualification in NZ.
Classroom assistants here are called "Teacher Aides".
They would not be allowed ot take classes like that - and - I to say it - are paid a pittance. Approx $11 per hour.
Although - I dont really know about teaching in Special Needs units - i.e. if there is a more formal qualification for them that the HNC would equate to.
Sorry not to be able to give you bettter news.
Has she not thought of taking a Teaching degree? There are lots of incentives here for you to do that - particularly in subjects of demand.
Carol