But her suggestions to transfer the violent student to a more specialised school were ignored by Clay Hill School in Lyndhurst, Hampshire, leading up to the attack.
Mrs Stone, from Bournemouth, Dorset, sought legal actions as she believed the school’s alleged failings contributed to the assault in May 2019.
Before the trial went to court, she received a six-figure settlement.
The ex-teacher, who has had to give up the job she loves, has now spoken out to help ensure ‘no one else goes through’ a similar ‘deeply troubling’ case.