She said it seemed to work, adding: "He had a lot of respect for all of the work that had been done for him at our school."
Emwazi reportedly struggled academically in primary school but improved in secondary school, where teachers described him as "diligent, hard-working...everything you would want a student to be".
An official statement from the school, released by Westminster Council yesterday, said it was "shocked and sickened" that the former pupil was involved in terrorism.
David Cameron has spoken out in defence of the intelligence and security agencies after associates of the London university graduate accused them of playing a part in his radicalisation prior to his departure to Syria.
Speaking after the militant - seen wielding a knife in a series of barbaric videos of hostage beheadings - was identified as Kuwait-born Emwazi, Mr Cameron said his "number one priority" was to ensure that those responsible for crimes against British citizens were "put out of action".
Scotland Yard has refused to confirm reports of Emwazi's identity.
- The Independent