About a dozen Revere High School students are at risk of suspension or expulsion for stirring a brawl that reportedly injured an administrator, an incident the teachers union says it saw coming.

The incident is the latest sticking point in a months-long call from the Revere Teachers Association for the district to come up with solutions to address what it’s calling a “health and safety crisis.”

Teachers have formed several ideas to address the situation, including creating a health and safety task force and hiring more social workers to bolster transparency and better track student misbehavior and school violence.

In a Friday statement, association co-presidents Michelle Ervin and Jane Chapin blasted the School Committee for “ignoring” their requests.

“Rather than addressing the safety crisis happening in our schools,” Ervin and Chapin wrote, “the Revere School Committee has doubled down in misrepresenting what is happening in our schools and consistently dismissing our school safety concerns.”

The union, via Facebook, called on teachers Friday afternoon to sign petitions for “safe and healthy schools” and to attend a City Council meeting scheduled for Sept. 9.

The School Committee and Mayor Patrick Keefe Jr., have not made statements on Thursday’s brawl which started when dozens of students began to fight in a hallway during lunchtime.

Video capturing the drama showed a student elbowing a staffer, who the union identified as an assistant principal, to bash her head against a locker and fall to the ground, WHDH reported.

Screaming filled the hallways before students allegedly poured out of the building and onto the street, causing traffic to become gridlocked.

The Revere Teachers Association, in its Friday news release, alleged the administrator was knocked out and taken to the hospital.

District officials, in a statement, confirmed the staffer was hit during the altercation and then checked out at a hospital but disputed that the staffer was knocked out. The staffer went home feeling normal.

Roughly a dozen students identified in the fight are set to face disciplinary action including possible suspension or expulsion, officials said.

“Revere Public Schools is among the highest achieving school districts in the state and we work every day to provide a safe learning environment for every student,” they said in a statement. “We have zero tolerance for violence in our schools and are coordinating closely with our teams at Revere High School and Revere Police to ensure all parties involved are held accountable.”

Revere High School enrolled 2,098 students last school year, according to the state Department of Elementary and Secondary Education. The district had an overall enrollment of 7,344.

Also within the first week of class, the teachers’ union accused “many” students of getting into an altercation after school on a street nearby. The union alleged an object that appeared to be a gun was seen in a video of the incident.

Teachers are also demanding the School Committee create designated “therapy rooms” to serve as a safe space for misbehaving students.

“Revere educators saw this coming as we have consistently raised these concerns, and now our schools are being impacted by this avoidable incident,” Ervin and Chapin said of Thursday’s fight. “Revere educators know that our working conditions are our students’ learning conditions, and we are deeply frustrated as we have provided solutions to address this health and safety crisis. It has fallen on deaf ears.”

In a briefing on the district’s website before the first day, officials touted how 100 new teachers were hired for the new year. Roughly 20 positions remained open, most in special education and teaching English as a second language.

“A quality education is something that sets cities and towns apart, and this year’s hiring numbers are a testament to the continued upward trajectory of our school district,” Mayor Keefe said in the briefing.

Revere is not the city or town dealing with student behavioral issues.

The Somerville Public Library has started closing its main branch for a couple of hours after school as concerns rose around the safety of staff and visitors, a development the city says “reflects broader systemic issues.”

In Brockton, a Starbucks near the high school has closed its dining room after school to prevent hordes of teens from congregating, while the serving counter will remain open, according to reports.