The National Assessment of Educational Progress (NAEP) has been collecting data on student achievement since 1969. It currently maintains three different assessments: long-term trends, cross-sectional national, and cross-sectional state-by-state data. Although the data are available to researchers outside the Federal Government, limited use has been made of them, due in part to the quantity and complexity of the data. The National Center for Education Statistics (NCES), which administers NAEP, has developed a number of software products to increase the accessibility and usability of NAEP data. This report gives an overview of the contents of the NAEP databases, the problems researchers face in working with them, and the software tools that have been developed to help overcome these problems. All of the NAEP databases are appropriate for assessing the proficiency of populations rather than individual students. To analyze NAEP data accurately, both sampling and the psychometric design must be taken into consideration. Researchers with the proper background can use the NCES software to work with NAEP data rapidly and efficiently. The following products are described: (1) the 1992 and 1994 "NAEP Almanac Viewers" on CD-ROM; (2) "NAEP Data on Disk Assessment Series" (CD-ROM); (3) "The NAEP Data Extraction Program," to be used with "Data on Disk"; and (4) a Statistical Package for the Social Sciences (SPSS) module to be used with SPSS for Windows. How to order these products, and how to obtain the restricted use licence needed for the "NAEP Data on Disk Assessments" is outlined. (SLD)