Volume I of a three-volume guide to school-based and school-linked health centers, this document was written for advocates at the community level who are trying to nurture support for the creation of a school-based health clinic (SBHC). The volume was written with three objectives in mind: (1) to help the advocate learn about school-based and school-linked services and the need for these services in his/her community; (2) to help the advocate plan a strategy to persuade policymakers and community residents that a school-based health clinic is an appropriate intervention; and (3) to provide the advocate with the tools necessary to carry out an advocacy campaign. Chapter 1 presents some important facts on adolescent morbidity, the advantages of SBHCs, and the assessment of community needs. Chapter 2 focuses on developing an advocacy campaign. Chapter 3 discusses tools of advocacy, including using the media to educate the community, lobbying for political support, and holding public meetings. Chapter 4 considers how to deal with opponents by minimizing the controversy over reproductive health care and identifying other potential opponents. Relevant materials are appended. (Contains 14 references.) (NB)