This guide addresses the role of online searching in school library media centers. The first section reviews the literature in the area and presents guidelines for planning and implementing online access for students based on the experiences reported. This section lists 44 references. The second section summarizes the results of a 1986 survey of online providers in the schools which examined four basic questions: (1) who is searching in the schools; (2) what the policies are regarding online in the schools; (3) systems, databases, hardware, and software used in the schools; and (4) the demographics of online search providers. The third section summarizes the findings of the survey, and an annotated bibliography of materials on the topic published in the 1980's is presented in the fourth section. A total of 41 items are grouped in the following categories: Introductions to the Topic; Recent Texts and Instructional Guides; Recent Articles about Online Searching in the Schools; Accounts of Practice by School Media Specialists; and Management of Online Information Services. Journals that publish articles on online searching in the schools and bibliographies covering the topic are also listed in this section. Lists of selected document delivery services and vendor contacts for school media specialists are appended. The second edition differs from the first in that the review of the literature has been recast in the form of guidelines for planning and implementation, and both the review of the literature and the annotated bibliography have been updated through spring 1989. (MES)