In this paper, we describe an e-learning tool that we have\ud developed to assist University students studying Relational\ud Schema design. The tool employs Expert System techniques\ud to create a learning environment in which students can explore the concepts of dependency theory, and the normalization process. The tool is able to respond in an individualistic way to student input and allows students to construct their own learning environment and develop their understanding of the material at a pace that is controlled by the individual student. Our formative and summative tests indicate that the tool provides students with a different and valuable type of learning experience when compared with a traditional, textbook-based approach.\u
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