This publication provides a guide for developing a substance use policy. A substance use policy sets out, in writing, the framework within which the whole school community manages issues relating to substance use. It should reflect the unique ethos of the school and should aim to develop a shared understanding of the term 'drugs'.The issues involved in the design of a school substance use policy are complex. The policy should represent an integrated community - based response. It should be developed through existing consultative structures within the school and should build on existing school policy, e.g. discipline, bullying, RSE.