Holbrook School is a school for pupils with autistic spectrum disorders and learning difficulties. It has a second primary unit on the main site which caters for pupils with autistic spectrum disorders with average learning abilities. The sixth form is partly on the main site and on a site approximately two and a half miles from the main school. All pupils have a statement of special educational needs for autistic spectrum disorders and severe learning difficulties. The proportion of pupils who are supported by the pupil premium is approximately a third of the school population, which is average compared with national figures. This extra government funding supports pupils who are known to be eligible for free school meals and/or looked after children. The proportion of pupils from minority ethnic groups is average. However, the proportion of those who speak English as an additional language is well below average. No pupils access alternative provision. There is residential provision for pupils for up to four nights per week, but this provision did not form part of this inspection. The school provides outreach work to local authority mainstream schools that have pupils with autism.