A 12-year-old girl slashed across the face by another pupil says she wants to return to the school where it happened.
Shanni's grandmother says the girl will be scarred for life
Shanni Naylor needed 30 stitches in her face after the assault during an English lesson at Myrtle Springs School in Sheffield on Wednesday afternoon.
It is believed she had intervened to stop her assailant bullying another pupil the day before.
A 12-year-old girl was arrested in connection with the attack and released on police bail until December.
It is thought the attacker used a blade from a pencil sharpener to slash her victim.
Shanni Naylor, who spent three days in hospital, said she had problems with her attacker before the incident.
She said: "I had just got up to talk to Miss Doyle (the teacher) and she (the other girl) just attacked me.
Lee Naylor comforts his daughter on her release from hospital
"I think it was with a blade.
"I'd had a fight with her before and it drew some blood."
Shanni needed to have 30 stitches put in at Sheffield Children's Hospital.
Speaking at her grandmother's home in the Arbourthorne area of the city, she added: "The doctors just told me to take it easy and to be careful...They said I might have to have plastic surgery."
When asked about going back to the school where it happened she said: "I just hope it gets better. I've got a lot of friends there."
Shanni's grandmother Kathleen Naylor, 55, said doctors had told the family that her granddaughter would be scarred for life.
One wound runs from the girl's hairline down across her left cheek, just missing her left eye. The other starts just below her right eye and runs down her right cheek.
"In time it might fade," said Mrs Naylor. "But Shanni may have to go back for operations for skin grafts."
"I would not want it to happen to any other child in any other school. Somebody will end up more seriously hurt than she was."
On her release from Sheffield Children's Hospital, Shanni's father Lee, 33, said it was not yet clear whether his daughter would return to the same school.
"I would like it to be a lot stricter with more security and safety, not just for Shanni but for the other pupils as well," he said.
"I can't wait to get her home for a bit of TLC with her dad."
A spokesman for headteacher Ed Wydenbach said: "I can confirm there was an incident in school which was dealt with accordingly. A knife was not involved."
On Friday Myrtle Springs School confirmed there was a second incident there the day after the attack on Shanni Naylor.
The school said the incident had now been dealt with and was unconnected to the attack on Wednesday.
It is understood two girls received minor injuries when they were attacked during a lunchtime dance session.