She will live in three different homes to experience a range of family life. Her first home is with Rangitoto College teacher Julia Tod.
"She not only lives with me but has to be in my classes twice a day."
For Sorn, who has always had to share a room and clothes, life in New Zealand has proven to be a huge eye-opener.
"In Cambodia, we usually ride bicycles to school, but here I always travel in the car and in buses. I miss cycling," she said.
Sorn, who is taking tourism at level 2 and 3 this year, hopes to work in the hotel industry when she returns to Cambodia in December.
She is also taking the opportunity to learn photography and computer studies at the college.
Already the diminutive pupil has hiked across Tongariro Crossing, climbed Mt Ruapehu, sailed on round-the-world yacht Steinlager 2 and gone jetboating.
Those behind the trailblazing project say Sorn is making the most of her opportunity.