This is a collection of four papers concerned with improvement of Chapter 1 programs in the northwestern United States. The first paper (Steve Murray) describes a program improvement support model presently in use. It summarizes the process of program adoption in five northwestern states and describes differences in state context that have influenced the adoption process or use of the program improvement model. The second paper (Sam Stringfield) describes the Chapter 1 Program Improvement Workshop Series offered by the Northwest Regional Educational Laboratory Chapter 1 Technical Center. Central features of the workshop series and modifications required by different states and local programs are reviewed. The third paper (Alan Davis) addresses differences in implementation of improvement of Chapter 1 projects at the district level. Case histories from three districts illustrate the initial context of each project, the changes brought about while the district was involved in the improvement process, and other factors influencing the project. The changing role of leadership is seen as a central influence. The final paper (David Leitner) details one district's involvement in a Chapter 1 Program Improvement Project. Three major components of the program are examined: program self-assessment, the change process, and outcome data. The importance of context sensitivity for models of program improvement is emphasized. (DHP)