This CD-ROM contains data and documentation files for the second phase of the NAEP Trial State Assessment Program in Mathematics. The first trial state assessment was conducted in 1990 and collected information on the mathematics knowledge, skills, understanding, and perceptions of a representative sample of eighth-grade students in public schools in 37 states, the District of Columbia, and two territories. The second phase of the trial state assessment, conducted in 1992, collected similar information for both fourth- and eighth-grade samples in the same jurisdictions. Included on the CD-ROM is a User's Guide provided in electronic portable document format (PDF). This guide contains information on the contents and use of the data files on this disk as well as the assessment design and its implications for analysis. NAEP datasets from 2002 onward require a Tool Kit with the updated NAEPEX. Your organization must apply for and be granted a restricted-use data license in order to obtain these data.