A Hamilton Boys' High School student was injured during the prank on November 1.

One of the girls involved in an end-of-year prank where topless teenage girls rode motorbikes through Hamilton Boys' High School - hitting and injuring one of the students - has appeared in court.

Shannon Jorjia Read, 17, appeared in the Hamilton District Court on Friday facing one charge of driving carelessly on Argyle Street and thereby caused injury to Kyle Kirsten.

Through her counsel Courtney Deed, she pleaded guilty to the charge and was remanded at large until her next appearance on March 9, for police to consider a discharge without conviction.

It was about 12.50pm on November 1 when Read was part of a group of six senior Waikato Diocesan School for Girls students who rode dirt bikes through the grounds of Hamilton Boys' High School wearing just underpants, shoes and helmets.

The girls, who were riding back to back on three bikes, had timed their escapade through the school grounds and on to the sports fields for the lunchtime break and were seen by dozens if not hundreds of Boys' High students.

The victim, a 17-year-old Boys' High student, was playing soccer with other students and did not see the bikes coming.

The foot pedal of the bike Read was riding swiped his leg, causing a gash to his leg that required 12 stitches.

The police obtained footage from a GoPro camera that was dropped on the ground when one of the girls fell off the bike after hitting and injuring the boy.

The stunt made national headlines.

At the time of the incident, Waikato Diocesan School for Girls principal Mary Curran said she was very concerned.

"This is unacceptable behaviour, which we are taking very seriously.

"Due school process will be followed."

Curran said she was supporting police with the investigation.

"The injured student and his family are in our thoughts and we wish him a speedy recovery."

Also speaking soon after the incident, Hamilton Boys' High School principal Susan Hassall said the girls' actions moved beyond a prank.

"What is disturbing is the scale of it that has moved to a level of being dangerous.

"This is something the Waikato principals have worked hard to stop from happening and we have been successful in ensuring that in the past.

"This wasn't a prank - this was seriously dangerous behaviour."

She said it was up to police to decide whether to lay charges.

"If people break the law, then charges should be laid. I think the other school should be treating this very seriously, which I am sure they are."

Kyle - one of the school's top football players - was recovering well, she said.

Kyle's father, Glenn Kirsten, said it was "a prank that has gone a bit wrong".

"The main thing is that the girls didn't mean him any malice. They were having a bit of fun and it's turned into an accident but it's nothing major." he said.

Hassall said she was aware of an incident in which several boys had run through the Diocesan school grounds in G-strings.

She had reviewed photographs of the boys, whom she did not recognise, and said there was no evidence to suggest they were students at her school.

"I don't think you could possibly say that students riding at speed through school grounds is any sort of retaliation - this was irresponsible behaviour.

"There was nothing lighthearted or prank-like about this behaviour. It's completely inappropriate."