The article begins by challenging what is considered to be the relative neglect by child and family social work of the importance for children of school and teachers. Key roles of school in children's lives are conceptualized. School is argued to have potential as an ally for children, a guarantor of basic protection, a capacity builder, a secure base from which to explore the self and the world, an integrator into community and culture, a gateway to adult opportunities and a resource for parents and communities. It is suggested that school can have a special supportive value for children experiencing adversity, including those in state care or under supervision, those whose parents have divorced, and those recovering from abuse or neglect. The implications of the central importance of schools and teachers for child and family social work are discussed with reference to the child as client, work with teachers, work with the wider school and community, and policies in social work agencies and in education and training programmes for social workers and teachers.