This is a report of a developmental research study that aimed to construct and validate an instructional design (ID) model that incorporates the theory and practice of multiple intelligences (MI). The study consisted of three phases. In phase one, the theoretical foundations of multiple Intelligences and ID were examined to guide the development of such model. In phase two the model components were determined and an initial model was constructed. In phase three, the model was reviewed and validated by experts in the field of ID through a three-round Delphi study. The result was a revised and validated Multiple Intelligences Design Model. This paper presents the decision-making processes and procedures used in model development, and provides a framework for the internal validation of ID models using expert review procedures.