A selection of articles on National Assessment of Educational Progress, which measures American education, is presented with varying points of view. The introductory editorial reflects on the progress of National Assessment in measuring learning and in achieving its goal of sound rational decisions about the future of American education. The following articles deal with reasons for evaluating education, some values of assessment, industry as a consumer, the significance of National Assessment as compared to ordinary standardized tests, the first results, technical giants of the project, a layman's view, the possibility of changing American education, making the data work, trends in State assessment, and program support. Comments and quotes by individuals and publications about the program are also included. (LH) Primary type of information provided by report: Program Description (Program Goals); Procedures (Conceptual).