A Wellington Girls' College teacher has resigned after allegations he had an inappropriate relationship with a student.
The teacher, has interim name suppression while the Education Council investigates, Fairfax reported.
It was reported the man had a close group of "favourites" at the school.
He described his relationships with students in an email to a former student last year, following the start of the investigation.
The email, obtained by Fairfax said, "It's very possible that I'm not really cut out for the job that I do. I get results by treating students as peers and expecting the same of a student that I would expect of any adult. Expecting adult relations from students was woefully misguided on my part and probably, ultimately, dangerous and detrimental to the mental health of some."