Girl arrested in racism inquiry
Codie Stott said she asked to be moved from a science group where she was with five Asian pupils - only one of whom spoke English.
The 14-year-old was questioned in a juvenile unit before being released without charge.
Harrop Fold High School, in Worsley, is investigating before deciding on what action to take.
Codie said: "I asked the teacher could I change groups because I didn't understand them and she said I was being racist and started shouting at me."
A complaint was made and she was taken to a police station.
Her mother said her Codie's jewellery and shoelaces were removed, her fingerprints and DNA samples were taken and she was put in a cell.
The school said it wanted to ensure it had a caring and tolerant attitude to pupils of all ethnic backgrounds and it did not stand for racism in any form.Greater Manchester Police said it took hate crime reports very seriously and its treatment of the teenager was in line with normal procedure.