Evaluating the use of technology in education in the past has yielded conflicting results due to inadequate implementation of technology and premature attempts at evaluation. The necessary phases in using technology had been ignored. This article introduces the concept of the three E's — Extensiveness, Effectiveness, and Endurance — as the three phases in an innovation diffusion process; reviews previous research studies on uses of technology in education in the context of the three E's; and discusses the implication of the three E's for technological innovations in education and for evaluation.
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