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Kaplan, D., Youm, J. & Shaenfield, D. (2003). MetaTool: An open authoring system for Instructional Design of Educational Technology. In D. Lassner & C. McNaught (Eds.), Proceedings of ED-MEDIA 2003--World Conference on Educational Multimedia, Hypermedia & Telecommunications (pp. 75-78). Honolulu, Hawaii, USA: Association for the Advancement of Computing in Education (AACE).