The victim was accosted by a 14-year-old girl in Garema Place on Saturday afternoon while hanging out with friends.

She had to be anaesthetised at Calvary Hospital that night, and is now back at home.

The victim's mother had removed the girl from Lyneham High School two months earlier, after the attacker threatened her life.

It is understood the attacker is a student at the school.

Lyneham High has been dogged by reports of bullying and violence recently.

In mid-October, two girls were allegedly pressured into fighting while others filmed the incident, intending to post the footage on the internet. The mother of one of those children withdrew her from the school, but later felt comfortable enough to re-enrol her.

''The school is mediating disputes quite early now,'' she said.

The victim of Saturday's assault had attended Northside High School Support Centre after leaving Lyneham.

Her mother said the arrangement was inadequate but was the only option given to her by the Education Department.

''They said that she could go to [the centre] for two days a week, from 9(am) until 12,'' she said.

''The school didn't give her any work to do ... she said all they've done there is watch some videos and play some games.''

She said her child had become bored and stopped going.

''And now she's got in with this very rough crowd who hangs around Garema Place, and that's where [the alleged attacker] hangs around as well,'' the mother said.

''My daughter's a naughty little girl, but she doesn't deserve to be smashed in the face.''

The Education Department was unable to comment at this stage for privacy reasons, but said it would make sure all possible support for the family was in place.

Nevertheless, the victim's mother said the department had failed students.

''They don't expel miscreants, they don't expel criminals, they keep them there.''

The girl's mother said it was unlikely her daughter would return to school for the rest of the year, and was looking at her options for 2009.