The Education Review Office says children and young people living in Oranga Tamariki residential care are not getting a good enough education.
ERO has consistently found that the education these vulnerable students receive is too variable and dependent on which residence they are in.
The office's new review has found that a quarter of sites are not serving students well.
ERO's head of Te Ihuwaka is Ruth Shinoda.
Oranga Tamariki declined a request to be interviewed.
