This handbook, produced by the School Environmental Impact Program (Indiana) was developed to improve school environments and to create more positive attitudes and behaviors in school participants (all those involved in the school and its environment). It is designed to help in the assessment of school conditions by individuals, groups, or school districts. The program focuses on the cafeteria as the hub of the school, since profound interaction has been observed between activity in the cafeteria and in other school settings. An overview provides a discussion of the total school environment, pointing out its composite parts: physical attributes, school rules on behavior, attitudes related to responsible behaviors in school settings, and decision making. Ways in which activities suggested in the handbook can be carried out are described. A format for conducting workshops to increase awareness of the school environment and to plan activities to improve attitudes and behaviors is presented. Four workshop activities are introduced: (1) to promote awareness of the school environment; (2) to assess problems and opportunities for change within the school setting; (3) to plan for achieving specific goals; and (4) to evaluate the success of the program. A questionnaire is provided for use in each of these activities. A case study is presented of a workshop that was successfully conducted using the format offered in this handbook. An annotated bibliography of eight major works in the area of school environments and their impact is included. (JD)