This project paper explains the theoretical basis that educators used in writing developmental career education materials for Project Green River Opportunities for Work (GROW) in Region 3, Kentucky, and outlines the steps regional and district personnel took in laying the groundwork for the publication, "Learning Concepts in Career Development." Formation of regional personnel committees to plan the scope, sequence, and delivery system design included in the kit is described. The report concludes with recommendations for the kit's use and discusses improvements. The author indicates that the Region 3 method of selecting concepts and choosing a mini-unit technique for its matrix design for kindergarten through secondary and post-secondary levels can serve as a model by others in planning similar career education programs. The matrix format described uses the kindergarten through post-secondary grade levels as the vertical dimension, and mini-units under learning concept headings of self awareness, career awareness, appreciations and attitudes, and decision-making skills form the horizontal dimension of the matrix. Appendix A presents the Project GROW sequential delivery system for career education matrix design. Appendix B develops the four learning concepts in career development. Appendix C outlines four mini-units in self awareness. Appendix D contains the mini-unit evaluation sheet. A list of references is included. (Author/TA)