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This paper proposes a general method on how to build a semantic model for instructional design. At the meantime, a semantic model for instructional design is also proposed (called SMID), which mainly includes ontology and processing module. SMID ontology includes several ontologies used in instructional design, such as knowledge object ontology, material object ontology, learning goal ontology, instructional strategy ontology, learning action ontology; SMID processing module means the processing method used in instructional design, including knowledge selection, instructional strategy selection, learning action sequence generation, learning resource generation. With J2EE Platform and Drool tools, the SMID system is implemented, and some experiments with real course are done and conclusions are also given.

In this paper, based on ontology, a kind of system architecture is proposed to generate learning resource dynamically with learning goal, which is called LRDG. At the meantime, a semantic model and related processing methods are designed. The semantic model consists of knowledge object ontology, learning material ontology, learning action ontology and instructional strategy rule format. Processing methods include knowledge object decomposition, knowledge object selection, rule reasoning engine, and learning resource generation. With LRDG, the learning resource can be generated at learning time according to learner?s present knowledge state. Also, a system is implemented with J2EE platform and Drool rule engine, and a prototype course is developed. At last, the author gives experiment result and draws conclusion.