An academy trust could lose its contract to run a Lincoln primary school after inspectors criticised it for poor educational standards.
The Department for Education said Harbour Learning Trust needed to deliver "rapid and sustainable improvement" at the St Giles Academy or the management would be replaced.
An Ofsted inspection in April said the curriculum at the school was "poorly-designed" and pupils did not acquire the knowledge and skills they needed.
The Harbour Learning Trust admitted the school had not been good enough and said work was already under way to improve it.
