Have read lots of this as all over local press. The "victim" of the blade attack sounds like she was a really nasty bully towards the offender. Just the day before she was seen by teachers and pupoils to hit the offender several times so hard her head banged against a wall.
When this story first broke the victim was made out to be an innocent little girl, and it being a totally unprovoked attack. That no longer seems the case at all.
Although the girl did intend to take the blade - which was actually part of her school pencil sharpner, not a knife - and to approach this girl, the information ggiven suggests that she did not intend to hurt the victim so badly. The info given suggests she meant to warn and scratch the girl.
This offending girl is a Somalian who was orphaned when she was very young. It would appear she has suffered several sustained attacks of verbal and phsyical bullying at the hands of the "victim" and others at school and outside of school. I think she just cracked under the pressure and felt she had to just do something to make the bullying stop.
Not sure what other sentence could be givem. I don't think a custodial sentence would help the girl, and what message would that give to the bullying victim too? IMO both girls should be punished equally - if what is being published if correct anyway.