Children's language difficulties affect many areas of functioning and devlopment. Since most children with these difficulties are expected to function in ordinary schools and nurseries it is important that parents, teachers and practitioners have a broad understanding of the issues. Language and communication problems typically fall under the umbrella terms 'language disability, 'language delay', or 'language difficulties. They can range from an occasional difficulty with certain sounds to an inability to communicate using spoken language. These problems can occur in isolation or be associated with a range of special needs such as hearing loss, visual impairment or learning disabilities. This is the first introductory text to outline the difficulties experienced by children and link these to issues surrounding multidisciplinary assessment, intervention and service provision.