As children head back to the classroom, a "vocal minority" have resorted to violence or disruptive measures to protest against mask mandates in schools.

Driving the news: While the majority of Americans support the mandates, according to a recent Axios/Ipsos poll, back-to-school confrontations across the U.S. have gotten so hot that teachers and other officials have been punched, hit and screamed at.

What's happening:

In Texas, Tom Leonard, the superintendent of Eanes Independent School District, wrote in a note to parents and staff last week that the return to school has been marked by "a few sad moments."

• One parent in the Austin-area district allegedly assaulted a teacher by ripping off her face mask, while others yelled at another teacher, claiming they couldn't understand what she was saying due to the face covering.
• "This is everywhere," Leonard told NPR, saying that he'd spoken to education leaders in California, Illinois and New York who've experienced similar issues.

In Northern California, a parent allegedly left a teacher bleeding and requiring hospital treatment — after the parent tried to attack the principal over masks and the teacher jumped in, KCRA-TV reported.

• “The teachers have definitely been on edge. They are fearful because the last thing they want is to have an issue with a parent,” Torie Gibson, superintendent of California's Amador County Unified School District, told AP.

In Kansas last week, officials in Douglas County were confronted by angry unmasked protesters who opposed an indoor mask mandate for two- to- 12-year-olds, invoking comparisons to the Taliban and leaders of Japanese internment camps, according to AP.

Even before students headed back to the classroom, school board meetings across the U.S. saw heated confrontations over whether masks should be required for students and teachers.

• In Nevada and Pennsylvania, meetings this month devolved into verbal arguments so aggressive that police were called in.
• At least 11 protesters who disrupted a Utah school board meeting in July are facing criminal charges, AP reported.

The big picture: Public health measures like mask and vaccine mandates have become a political flashpoint across the country even as COVID-19 cases surge nationwide due to the Delta variant.

• Schools districts in Florida and Texas are defying executive orders by their state governors banning such mandates. Schools in Arizona and South Carolina are fighting similar bans.
• Some colleges and universities, meanwhile, are instituting disciplinary actions against unvaccinated students.

Go deeper: America's patchwork back-to-school plan