The Application And Research Of Multi-medium CAI In Chemical Experimental Teaching In Middle School

Chemistry is a natural science based on experiments. It is a central discipline of the chemistry science, and an organic part of science courses. Experimentation is the most essential and basic means of scientific discovery. Therefore, it is closely related to solving scientific problems. In order to improve students' abilities to solve chemical problems, raise their interest in scientific exploration, and foster a precise , attitude towards scientific experiment, teachers should create as many opportunities as they can while teaching chemistry, so that students can do practical experiments by themselves, especially make students"do exploratory experiments just like little scientists."However, there are some microcosmic, poisonous, on slowing-reacting and time-consuming experiments that can't be carried out in class, as well as some large-scale chemical engineering and new scientific advancements in chemistry that are also difficult to demonstrate in class. By the means of course-ware, the static experiment can be made dynamic, the micro content can be made specific, the abstract knowledge can be made figurative, and the chemical engineering can be made simulated. Thus, with the help of sound, shape and color in course-ware some experiments, which are limited by experimental conditions, can exactly show the chemicalreaction phenomena. As a result, the chemical law will be discovered and all experiments can become a kind of lively"reality"。It is a tendency in the reform and research in the chemisty experiment demonstration teaching in middle school to take advantages of multi-medium in future. Based on the theories'essence such as behaviorism study theory, the cognition study theory, construction principle study theory, the humanism study theory in the modern study theory; the development teaching theory, the"structure - discovers"teaching theory, the teaching optimization teaching theory in the modern teaching theory; with the aid of the mutual pattern,"fiveW"dissemination pattern, Berlo's SMCR in the modern education disseminates. It aims to improve the chemical teaching by making good use of the characteristics and functions of multi-medium.According to these principles we can obtain the enlightenment from them, in current middle school chemistry experiment teaching has a lot of insufficiency. For example, the teaching test installation and the equipment is backward, we lack the environmental protection consciousness; The classroom is big while the number of student overstaffs, but the scale of responding installment is small, the student can't observes the phenomenon clearly; The students'confirmation experiments are many, the inquiring experiments are few; The teacher speaks of experimental often, but does them little and so on. From multimedia chemistry experiment class manufacture theoretical basis,function, application scope, establishment principle and establishment process.We should combine closely the the insufficiency to explore how to fully use the characteristics and functions, of multimedia technology such as the integration, the interaction, the timeliness, direct-viewing, the analysis and feedback and so on to raise the middle school chemistry teaching level, to improve middle school chemistry experiment teaching effect. Separately from the simulation chemistry experiment principle, the simulation virulent and polluting chemistry experiment, the risky big chemistry experiments or difficult to demonstrate really and simulate some complex Chemical industry flows as well as modeling operation. Aspects I manufacture 5 multimedia classes, such as galvanic battery, the chlorine, the sulfuric acid industry facture, the alkali metal nature, center titration to explain the application of multimedia CAI in the experimental teaching. Simultaneously from the multimedia class'intellectualization, the editor, accumulated, the network, aspect and so on, the virtual reality has forecast multimedia CAI in the middle school chemistry experiment teaching application prospect.