Police have stepped in after violent fights at Kiama High School were posted on social media.
The school and the Department of Education acted swiftly after learning of an Instagram account set up to air assaults between teenagers.
"The school and department are aware that a number of incidences were posted to a social media site ... and took immediate steps to have the page removed," an education department spokeswoman said.
"Police have also been contacted to assist the school in ascertaining who may be responsible for this page, and any other similar pages. Investigations are ongoing," she said.
Concerned parents, including one whose son was involved in one of the altercations, contacted the Mercury about the public Instagram account which was later changed to private.
It featured more than 20 videos of fights, some with children in Kiama High School uniforms, and many others from different venues and teenagers not in any school colours.
The Department said Kiama High did not tolerate any violence or inappropriate anti-social behaviour from students, "which includes the filming and distribution of film, of a violent nature".
"The incidences depicted on the page occurred over an extended period of time and were addressed at the time they occurred.
"All students involved have been dealt with according to the school's discipline policy," the spokeswoman said.
"The school and the department continue to encourage parents and carers to monitor their child's social media usage and discuss the appropriate use of social media with their children, to support the messages provided to students by the school."
The e-Safety Commissioner says schools, parents and industry have a role in helping children have safer and more positive experiences online.
"In cases of school fights uploaded to online platforms, gratuitous depictions of real violence that are excessively detailed or prolonged may be assessed as likely to be prohibited.
"If such content were to be hosted in Australia, it may be subject to takedown action," commissioner Julie Inman Grant said.
"We advise fight videos of students to be reported to the social media platform they appear on."
If it's not removed within 48 hours, report to the eSafety Commissioner at esafety.gov.au.