Duncanville High School in Texas suspended more than 100 children on Wednesday for violating the school dress code.
School district spokeswoman Tammy Kuykendall said that between 100 and 150 students were sent home, reported the Dallas Morning News.
The students were sent home for violations that ranged from clothing to not wearing name tags.
"We didn't lose control, but some of our kids chose to make bad choices," Principal Andre Smith told News 8 (video below).
"We have high expectations for our kids," added Principal Smith. "We enforce dress code everyday and not just dress code. Every policy and procedure we enforce everyday."
The Duncanville High School does these mass suspensions three to four times a year as part of a "zero tolerance policy" that began in 2003.
The zero tolerance policy includes clothes with logos or designs and denim or sweatshirts that aren't white or navy blue.
Boys have to wear belts, while girls' skirts must be "hemmed at or below the bend of the knee," according to the school code.
The students get a one-day suspension for a first offense, two days for a second offense, while a third offense means more days of suspension and extra penalties.