A pair of female Chicago Public High School students violently assaulted a fellow female student during class last week while at least four other students stood by and the teacher looked on in shock.



"They got angry and went ghetto on her," the victim's best friend, a freshman at the school, told NBC Chicago on Wednesday. "Every day there's a fight. Today there was a fight in algebra."



The attack, which was caught on tape, took place during a biology class last Thursday at Roger C. Sullivan High School, at 6631 North Bosworth Avenue.



In the video, 14-year-old Jillian Salgado struggled to fend off her two attackers. A fourth woman appears to make an attempt to break up the fight before backing away. At one point, the assailants appear to slam the victim's head off a table.



"I could not feel anything but my adrenaline was pumping so much," she recalled.



Classmates said the teacher seen in the video was unable to stop the fight and that it took several security officers to break it up.



Salgado's mother, Maria Salgado, said she didn't realize how brutal the beating was until she saw the video.



"I am grateful for whoever recorded it because it did show the severity that no one realized," she said.



The teen suffered a concussion, a neck sprain and several scratches and bruises, but those injuries are minor compared to her emotional injuries.



"Even the school told her to take a few more days off, but she wanted to get returned and just show that she could," said Maria Salgado.



The two aggressors, 17-year-old and 18-year-old sisters, have been suspended from school with further discipline pending, said CPS spokeswoman Marielle Sainvilus.



"Chicago Public Schools does not tolerate violence among students in any way," she said. "The safety and security of our students is a top priority and we will take whatever actions are necessary to ensure that schools remain a safe environment for learning."



Chicago police said the sisters have been arrested and charged with battery.