The small country school just outside Whangaehu, has 18 pupils.
"With my time at Fordell, I'm used to a rural environment and multi-layered teaching. Fordell and Whangaehu schools are both part of the Whanganui East rural cluster, and I'm glad to be back here. Rural kids are definitely different from urban kids - they're so vibrant.
"Whangaehu has a real family atmosphere, and there's a lot of community involvement. It's great to see the 12-year-olds looking after the 5-year-olds," Ms Reddish said.
She hopes to grow the school's roll, as well as continue its reputation of excellent learning.
"We're a viable option now - up there with other rural schools."
Ms Reddish takes over from former principal Craig Sharp, who is now deputy principal at Wainuiomata Intermediate School.