Tashaun Aird was stabbed to death in Hackney almost two years after he was excluded from school.
Tashaun's mother works in the education sector and said Inspire! did not share her ethos or educational values.
A post-mortem examination revealed Tashaun suffered nine wounds, including a fatal 11cm-deep wound to the chest Tashaun took weeks to recover in hospital and his family refused to let him return to Inspire! and he was tutored at home instead. It criticised the current government guidance, saying "despite the clear imperative for safeguarding risk to be an active component of decision-making, the statutory guidance falls short in emphasising this with sufficient clarity" and said the Department for Education should review this.
Anne Canning, the council's group director for Children and Education, said Tashaun's case was "tragic and complex".