CORRECTION: A previous version of this story included a tweet and image of one of the students with the flag. That was incorrect. That was from a high school in Texas, and the image and tweet have been removed from the story.
Three students came to school at Bloomington High School North Wednesday wearing Confederate Flags as capes.
The students wore the flags around their necks for the entire school day, which some other students said made them feel unsafe.
School administration says they could not force the students to remove the flags because of a Supreme Court case, Tinker vs. Des Moines, which establishes a student's right to free speech at a public school.
But one part of the Tinker law says a school may censor a student if administration can prove the speech caused a disturbance to learning, which principal Jeffrey Henderson later deemed was the case.
"That certainly caused a substantial disruption to the school day and the school environment," said district spokesperson Andrew Clampitt. "Anything that causes those types of disruptions we're certainly not in favor of."
In a letter to parents, Principal Henderson said, because of the disruption, Confederate flags and images of the flag are no longer permitted on school property or at school events.