An investigation has found Norfolk County Council is letting down children with special educational needs.
In one case a boy was not given the right learning support for nearly two academic years.
In another case, a primary school-aged boy was excluded from school and the council did not provide him with suitable education provision, causing him to miss out on full-time education for eight months.
The Local Government and Social Care Ombudsman has upheld nine similar complaints about Norfolk County Council over the last two years.
Michael King, from the Local Government and Social Care Ombudsman, said: “We have issued a focus report on out-of-school education provision for children, and on councils’ use of Education, Health and Care Plans, and expect councils to use these to scrutinise, learn from and improve the services they provide to children in their areas.
“In both cases these children were without the vital support and provision they needed at crucial times of their education. I hope the remedies the council has agreed will go some way to repairing the damage done.
“We welcome the proactive steps the council is now taking to improve its provision and oversight of services for children with SEN, and hope this will ensure children will get the support they need in future.”