The woman, who asked not to be named for safety reasons, received a tearful call from her daughter claiming she had been punched in the back of the head in a fight at the school.
One of the girl's friends had also allegedly been punched in the affray.
This was just one incident in a week of violent clashes at the Greater Shepparton Secondary College campus, which sparked multiple lockdowns.
Police were called again on Friday, and a student suffering head injuries was taken by ambulance to Goulburn Valley Health.
After the first incident last Monday, the school sought to play down the violence, but as the feuding between two groups continued, security guards were deployed at the Wanganui campus on Wednesday.
It didn't stop another confrontation.
Video of the brawl shows students leaping over lunch tables to join the fight or protect others.
The girl's mother claimed this was not the first time her daughter had been caught up in school violence.
"It went on all last year, but it really escalated this year," she said.
The woman's daughter called her again the following day, claiming a student had threatened to "bash her".
By Thursday, her daughter was too scared to go to school.
"I was ready to let her stay home because I'm worried for her safety, too," the woman said.
On Friday, she picked up her daughter again after an "all-in" brawl broke out at the school – this time involving the woman's nephew and her daughter's boyfriend.
A male student also challenged the woman's daughter to a fight.
"They were all scared," she said.
"With police and security guards at the school, I thought surely nothing is going to happen, but sure enough, they're at it again."
The indigenous woman claimed the ongoing violence is a "race war" between different groups.
She believed it stemmed from a fight between two students last year.
"They just haven't let it go," she said.
The mother felt the repercussions for violence at the school were not adequate.
"I think the school needs to take a stance," she said.
"If you're violent, it should be 'that's it, you're out'. Do they want someone to die? Do they want someone to get brain damage?"
The mother said her daughter was now struggling with anxiety because of the violence at the school.
Greater Shepparton Secondary College acting executive principal Barbara O'Brien said on Friday immediate steps were being taken.
"Incidents of violence and bullying are completely unacceptable, contrary to the values of Greater Shepparton Secondary College and will not be tolerated," Ms O'Brien said.
"There has been misinformation which has exaggerated the seriousness and scale of incidents on social media this week, which has exacerbated the situation."
Parents have expressed frustration that the school had not informed them of multiple lockdowns or the use of security guards.
Ethnic Council of Shepparton manager Chris Hazelman said social media had clearly inflamed an ongoing situation.
The News has viewed private social media pages with multiple videos that are being shared among students..
"It is a challenge," Mr Hazelman said.
"Some of the trouble last week allegedly involved non-students coming onto the campus.
"We are involved in ongoing discussions, including having a presence on campus as a point of contact for students from different language groups."
Mr Hazelman said a collaboration between the school, parents and agencies was needed to address the underlying reasons for the animosity.
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