Reigeluth(1997) who is one of the instructional design theorist makes suggestions for a new paradigm. He bases much of what he proposes on what he sees as a shift in our society from an industrial age paradigm to an information age paradigm. His nine from-to contrasts capture much of the essence upon which constructivist instructional design models are based. The purpose of this study is to review of the activities and procedures typical of design work based on constructivist instructional design model: R2D2. The R2D2 is abbreviations of the Recursive, Reflective Design and Development model. R2D2 is one of several ID models based on constructivist theory and. R2D2 model may seem most radical when it is compared to other ID models in the linear tradition. The most important parts of R2D2 model are three principles and three focal points. The three principles are recursion, reflection and participation. Constructivist learning theory is a more compatible framework for recursive, reflective design baed on participatory involvement than are behavioral or information processing theories. Three focal points of the R2D2 model are Define, Design and Development, and Dissemination. R2D2 model pursuits recursive, user-centered and participatory design approaches and the approaches to teaching and learning that emphasize student-centered as well as holistic work. It also has assumptions that there must be buy-in and participation by teachers in any change effort, and the change effort must emerge across the process rather than be given or handed to participants(teachers and students) at the beginning. There has been the needs for a new paradigm of instructional design theory. But with all these needs for a new paradigm of instructional-design theory, it is important not to completely reject and discard the old paradigm. In fact, the new paradigm needs to incorporate most of the knowledge generated by previous instructional-design theories, but that knowledge needs to be restructured into substantially different configurations to meet the new needs of those whom we serve.