Ms Duder said it was good to see progress being made after a highly publicised "kerfuffle" two years ago, when it emerged several schools elsewhere in the country were making students sign special dispensations if they wanted to bring their same sex partner to the ball.
"That's died down - we haven't heard of it again, though that doesn't mean it hasn't been happening.
"We underestimate the power that our young people effect on their environment and it's amazing to see them supporting their queer peers and seeing a different side to this, a more positive side, as opposed to the bullying narrative."
Whangarei Girls' High School principal Anne Cooper declined to comment.