He Matariki manager Terri Cunningham was thrilled to hear the news, and said it would benefit the whole of Northland.
"It is a real second chance for these teen mums, and it's about not only their future but the future of their baby," Ms Cunningham said.
She said He Matariki has a teen parent who is from Kaikohe but stays in Whangarei so she can go to the school and goes home on the weekends.
"These teen mums don't have many options. They can go into correspondence school, which is often really hard if you don't have support around you, or you drop out."
Amelia Herbert, 22, was a student at He Matariki when she became pregnant at 16. "No way can you do it on your own," she said.
Miss Herbert has been named Outward Bound NZ ambassador for 2013 and welcomed the new school in Kaikohe.
The Teen Parent Unit will accommodate up to 30 students. An opening date has not yet been set.