The National Household Education Survey (NHES) is a telephone interview survey that has been conducted in the spring of 1991, 1993, 1995, 1996, and 1999. The 1999 NHES was a compilation of survey items from previous years that included three interviews, resulting in three data files. One of these components was the Youth Interview, in which children in grades 6 through 12, whose parents had completed the Parent Interview, were asked about school and family environments, civic involvement and community service, and plans for postsecondary education. This manual provides documentation and guidance for users of the public release data file for the Youth Interview of the NHES:99. It contains a description of the data file and discussion of data considerations and anomalies. Included, as six appendixes, are the public file code, the Statistical Analysis System code for creating derived variable, crosswalks of the items asked in the 1999 Youth Interview and the civic involvement interview, the code book for the data file, and directions and code for linking files. The youth service activity coding manual is also included. Volume III is meant to be read in conjunction with Volume I, which provides more information about the purpose of the study, the sample design, the other survey components, and data collection and processing. (SLD)