To help school districts develop job descriptions, this report describes statistically how United States districts use, prepare, and revise job descriptions, and presents sample descriptions of administrative, teaching, and support positions. The information was gathered through a national survey of 1,085 school superintendents. Part I introduces the report, briefly reviews literature, discusses three methods of preparing job descriptions and suggests elements to be included in them, describes the survey's design and methodology, and advises the reader on interpreting the report. Tables in Part II summarize data on the following: (1) percentage of districts using job descriptions, (2) respondents' attitudes toward job descriptions, (3) positions for which descriptions are used, (4) purposes for which they are used, (5) persons and groups involved in their preparation, (6) frequency of revision, (7) persons responsible for revision, and (8) final authority over changes. These data are broken down by school district size and, for the uses of job descriptions, by region. Part III presents sample job descriptions, 19 for district and school administrators, 3 for teachers, and 13 for other school personnel. Two tables are appended to help users analyze the data presented. (MCG)