As part of the National Longitudinal Survey of the High School Class of 1972 (NLS-72), a Teaching Supplement mail questionnaire was sent to all respondents to the fifth follow-up survey who indicated they had a teaching background or trained for teaching (N=1,517). The instrument focused on the qualifications, experiences and attitudes of current and former elementary and secondary teachers and on qualifications of persons who had completed a degree in education or certification but had not taught. This manual familiarizes data users and others with procedures followed for data collection and processing of the supplement and provides necessary documentation for use of the Teaching Supplement data. The data gathered can be used to investigate some of the following policy issues related to teacher quality and retention: (1) ways to attract potential teachers to the profession; (2) how to match teachers' assignments with their academic training; (3) the nature of teachers' working conditions; (4) the level of teacher satisfaction with their jobs; and (5) the main incentives and disincentives for teachers remaining in the profession. The appendices include the questionnaire, codes used for occupation and industry, and the data layout. The last segment of the manual is the codebook for the Teaching Supplement data. (KSA)