Teacher Andre Vogel, 36, from Queensland's Noosa Pengari Steiner School, and 16-year-old student Gabriel Runge died when a van Mr Vogel was driving and a milk tanker collided on State Highway 5 near Reporoa on November 28.
Six other students, and teacher Tricia Jeffree, were injured.
A police spokeswoman said it appeared the van carrying the school group had crossed the centre line and collided with the milk tanker.
At the time Noosa Pengari Steiner School principal Allen Kloeden said a team of staff members at the school was offering counselling, support and care for everyone involved.
The staff and students were in New Zealand on a hiking trip.