Using survey questionnaires and interviews, researchers studied student and teacher victimization in the Chicago (Illinois) Public Schools in 1979-80. Survey samples included 94 to 600 principals and 1,413 of 24,000 teachers in the school system and 12,882 of the 240,000 students in grades 7-12; 600 of the students were also interviewed. Data were gathered on assaults, thefts, and robberies; problems involving street gangs; attitudes and perceptions about school crime; and recommended solutions. Variables covered included age, sex, race, grade level, victim or nonvictim status, location and other characteristics of crime, reporting of crimes, feelings of safety, expectations of criminal incidents at school, unsafe areas, weapons in school, and school or district attended within the school system. Volume I of this two-volume report describes the survey and presents data, conclusions, comparisons with the National Safe School Study, and recommendations. Among its findings are that thefts hit one-quarter of the students and teachers and that assaults victimize 3 percent of students and 2 percent of teachers. Respondents' recommendations center on a firm and consistent disciplinary policy. Volume II of the document discusses the methodology and provides copies of the questionnaires and data from pretest, absentee, and interviewee samples. (Author/RW)