This document is the users' guide for Version 1.0 of the Public-Use data tapes compiled by the National Assessment of Educational Progress (NAEP), 1985-86. The Public-Use tapes are produced to allow outside researchers access to the NAEP data. The tapes accompanying this guide, one for grade 3/age 9, one for grade 7/age 13, and one for grade 11/age 17, contain student responses to mathematics, science, computer competence, U.S. history, and literature exercises, as well as responses to questionnaires from students, teachers, and principals. Reading scores have been withheld from this 1.0 version, but will be included in later versions. The guide includes: (1) background information on NAEP and the public-use tapes; (2) special considerations for users; (3) description of the assessment instrument design, sample selection, data collection, and scoring procedures; (4) reporting subgroups and other variables; (5) suggestions on conducting statistical analyses of the NAEP data; (6) content and format of the data tapes; and (7) suggestions for using the Statistical Package for the Social Sciences-X (SPSS-X) and SAS computer software systems with this data. Appendices include a brief NAEP history and lists of related machine-readable data files and printed reports. (JGL)