Multimedia material is the basic component of multimedia courseware and the basic unit carrying teaching information. It includes text, graphics, images, animation, video, audio and so on. The preparation of materials includes collection and production, which is the most time-consuming and energetic work in courseware production.

Multimedia material library can manage multimedia format files such as streaming media, FLASH animation, documents and pictures, among which streaming media includes avi, wav, mpeg and rm.

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The cognitive theory of multimedia learning is one of the cognitive learning theories put forward by Richard Meyer, an American psychology professor, in the 1990s. This theory draws lessons from dual coding theory of Paivio( 1986), the cognitive load theory of Sweller( 1988), Baddeley's working memory model (1992), his own SOI model of meaningful learning (1996) and the construction of Bruner et al.

The cognitive theory of multimedia learning tries to explain the brain working process of learners in the learning process, and points out that the way the human brain processes information is the best match with multimedia learning, which is of great significance for promoting the teaching design of multimedia learning, especially for how to avoid cognitive overload. The effect and efficiency of meaningful learning can be maximized through proper multimedia teaching design.

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