Design of usable and useful interactive systems requires a model that explains the activities and context of use. Similarly, design of instruction requires a valid model that illustrates the activities of student and teacher in class and classroom context. This paper describes a process model for designing and implementing instruction using various multimedia instructional materials. Our model takes a scenario-based approach as its central concept. It conceptualizes the whole process of evolving multimedia instructional material as a double-loop of activities in which teachers and students work together to enrich it. The external loop comprises planning, implementing, checking and evaluating instruction, whereas the internal loop is made up of its implementation, verification, and modification. We provide a formal definition of the scenario used in the double-loop model and illustrate an example of how scenarios are used in the model. We also explain our instruction system, which facilitates activities in the double-loop model.
Keywords: Claims analysis, instructional design, model, multimedia instruction, scenario.