This book provides a format for taking information traditionally collected by library media specialists and showing how it can be used to examine existing programs or to document the need for a program change. Field-tested in several school districts, this new tool includes all the necessary forms and worksheets school media specialists will need to build and strengthen current programs or to protect them in times of potential cutbacks. This handbook includes output measures for media center use, materials use, materials availability, teaching availability, and staff development opportunities. The book is divided into two main sections. The first section "Choosing and Using the Measures" defines and explains the measures themselves. A chapter is devoted to each of the following: use measures, access measures (resource availability measures), and access measures (media specialist availability measures). The second section "Output Measures in Action" contains three case studies that simulate the data-gathering and presentation process. At the end of each chapter, a "Measure at a Glance" box summarizes the use of the measure, shows how to calculate it and, when appropriate, refers to a case study that illustrates its use. A "Quick Reference Guide to All Output Measures" is found on the inside covers. (Contains an index.) (AEF)