Campaigners have said children with special educational needs and disabilities (SEND) are still being let down one year on from a highly critical report.
Inspectors found Oxfordshire County Council was not meeting the needs of children requiring its help.
Oxfordshire SEND Parent Action, formed by local SEND families, said children and young people were still being left without access to education.
The council said it had committed an additional GBP1m to support SEND services since the inspection.
Last year's report found that few children requiring SEND services in Oxfordshire had their needs met, with many waiting years for help and not being supported until close to crisis point.
The inspectors said the service had "long-standing failings", leading to "a tangible sense of helplessness" among families.
One year on, Oxfordshire SEND Parent Action spokesperson Dr Claire Brenner said: "We're making every effort to help make things better, but we're seeing no improvement on any front.
"Oxfordshire County Council and the NHS board have shown us nothing that demonstrates progress. They are continuing to fail families."