The report found: 'Relationships between schools and members are poor, and characterised by mistrust.'
It said the council has not succeeded in attempts to improve school standards, and the gap between local and national attainment is widening.
Haringey LBC leader George Meehan said: 'I consider this to be a fair report. We do believe our schools have not been performing well enough and we are committed to changing that.
Cllr Meehan said the council would implement the report's 21 recommendations for improvement.
He said the report, published on 27 September, praised Haringey education director Frances Magee. She was credited with setting up a school effectiveness branch to raise standards and improving consultation with schools.