Since July 1978, RMC Research Corporation has been conducting a study concerned with several aspects of the Title I Evaluation and Reporting System (TIERS). Phases I and II included examination of technical and procedural issues, development of system materials, and assessment of state evaluation reports. Phase III was intended to be an operational test of the system using data reported for the 1979-80 school year. The project-level data included in the state performance reports, termed "project vectors," include information on project characteristics, evaluation practices, mean gains, and posttest scores for individual Title I projects at grades 2, 6, and 10. This report summarizes the major results of Phase III to date. In the first section, the data file and the results of the edit of the project vectors are described. Summary tabulations that describe Title I projects and their evaluation practices are presented. In the last section, preliminary results from an examination of differences in mean gains across testing cycles are described. (Author/BW)