This resource provides tools that are relevant to understanding the nature and scope of substance abuse. The tools are also meant to be helpful in identifying and guiding students who need help and in preventing substance abuse. The aids are grouped into five sections. Section I provides basic fact sheets on substance abuse among youth. Section II offers guides and tools related to screening and assessment, including a guide to major assessment tools, a summary outline of indicators of abuse, and an example of a substance abuse screening checklist. Section III offers a set of information fact sheets on major substances that are abused. Information on prevention and treatment is provided in section IV, which contains descriptions of model school-based programs and guides to self-help resources and additional health education materials. Section V outlines resources for more information and support, including Internet sites, centers, agencies, advocacy groups, and relevant publications. (Author/SLD)