Farrah Aftab was picking her daughter from Priestnall School in Stockport when she witnessed the ugly scene, where kids quizzed her of her whereabouts during the Manchester terror attack.
Ms Aftab said: ‘It is racism and bullying and the school don’t seem to be doing anything about it.
‘I am terrified as to what would have happened if we hadn’t gone to get her and if she hadn’t got in the car.
‘I’ve reported this to the police, local MP and the council and the governors of the school.’
She added: ‘On Thursday my husband and I had gone to pick her up from school sat in car, and before you know it girls and boys are surrounding the car peeping in back windows where shes sat.
‘She and I was saying go away but the girls hurling abuse at her and shouting ISIS, saying they would break her nose, calling her ugly, saying you watch what happens now.
‘My daughter got out car go to speak to a teacher and she was saying: ‘this is what I have got to put up with – I don’t come to school for this’, but the teachers seemed more concerned with me putting my phone away.
The 37-year-old mental health worker captured the scenes on her phone and went on Facebook to criticise the school and those involved.
The school offered to send home work for the unnamed girl so she could study at home, or said she could work in the school’s study centre.
A spokesman for the school said: ‘The matter has been referred to the Greater Manchester Police and the Local Authority. As this is now an ongoing investigation, we cannot comment further. Priestnall is an inclusive school and takes all concerns shared by parents and carers very seriously.
‘The school will work with the family and all parties concerned to address any issues bought to their attention.’
Greater Manchester Police said: ‘We are looking into the incident and officers are appealing for anyone with any information to come forward.’