First of all, teachers should analyze the teaching content for the courses they teach, straighten out the logical relationship between the knowledge structures of the courses, and then write scripts. The selection, expression and organization of teaching content should contribute to the realization of teaching objectives, conform to teaching principles and have attractive forms of expression. Courseware design should highlight key points, disperse difficulties, explain things in simple terms, be organized and be easy for students to understand. It embodies the principle of teaching all students in accordance with their aptitude and takes care of students' actual learning ability. The standard of language and writing, teaching content and its expression are in line with the basic principles of this discipline. The simulated images, quoted materials and data should be reasonable, accurate and true, and the scene setting, material selection, terminology and operation demonstration should meet the requirements of relevant specifications. The media is diverse, the material selection is moderate, the configuration is reasonable, the creativity is novel, the conception is ingenious, and the rhythm is appropriate. Words, images, animations and sounds are used reasonably, the words are eye-catching, the picture is concise, clear and harmonious, and the colors are coordinated and natural. Pay attention to the use of color contrast to highlight the main content. The design arrangement of screen area requires highlighting the main body, and the demonstration area occupies a prominent position and a large enough area of the screen, and can be extended to full-screen display mode; The content displayed on the screen should conform to the law of human memory, because the number of things that people can see clearly at the same time is limited. The content displayed on this screen should be concentrated, not too much and too miscellaneous, the sentences and words should not be too long, the arrangement should be orderly, the language should be concise, the meaning should be clear and the operation should be simple and convenient. It can make up for the deficiency of traditional teaching and achieve the effect that other teaching methods are not easy to achieve. A good CAI courseware is often designed and produced-used in class-revised and improved-reused-revised? After repeating it. Therefore, when developing CAI courseware, we should seriously absorb the experience of existing courseware and fully consider the problems of future modification and secondary development.
Second, the use of multimedia teaching, we must pay attention to master the amount of classroom information.
The use of multimedia teaching reduces the workload of teachers in drawing and writing on the blackboard in class, thus improving teaching efficiency. Using it well and mastering it properly can increase the amount of classroom information, speed up the teaching progress and broaden students' knowledge. However, in the teaching practice of using multimedia, if we don't pay attention to it, the amount of information in the classroom will be too large and the teaching progress will be too fast. Students are in an excessive state of thinking when attending classes, and there is not enough time to understand, digest and take notes, so that many students lose interest in multimedia teaching because they can't keep up. In the traditional classroom teaching, students have adapted to the teacher's teaching mode of speaking and listening, and follow the teacher's ideas in class, which is relatively slow. Therefore, after using multimedia teaching, we must properly grasp its advantages, grasp the degree of "point" and "enlightenment", and leave some time for students to realize when "point" comes. For students who are new to multimedia teaching, teachers should try to speak slowly and thoroughly at first, and after a certain adaptation period, increase the amount of information according to the specific situation to speed up the teaching progress. For some important and incomprehensible contents or expressions, we should not only use eye-catching colors, larger fonts or animations to express them, but also explain each meaning in detail at a slower speed. There should be some repetition when necessary, so that students can deepen their understanding and have enough time to take notes. In addition, teachers can put computer-aided teaching courseware on the campus network or provide it to students by copying, so that students can learn independently. Let students preview before class and review in time after class. Consolidating learning after class is an important part of knowledge transformation, which can guide students to make a second leap in cognition. Therefore, teachers should leave several representative exercises or thinking questions for students according to the specific content of each class to inspire students to explore further; Guide students to consult certain reference materials in the library, and cultivate students' ability of self-study, finding materials and solving problems; Some teaching contents can make students' learning skills and thinking develop synchronously by doing experiments after class, and further improve students' learning initiative by integrating theory with practice. The use of multimedia teaching can improve teaching efficiency, thus saving about 20% of class hours. But it should be combined with students' learning acceptance. In order to ensure the quality of teaching, the teaching hours should account for more than 80% of the past regular classroom teaching hours after using multimedia to teach general courses, and should not be too little. For example, the analog and digital parts of "Fundamentals of Electronic Technology" used to be 144 class hours. After multimedia teaching, it takes 120 class hours to finish. Another example is Securities Investment, which used to be a 56-hour class. After using multimedia to teach, it took 48 hours to easily complete the teaching of this course, and added some novel contents closely combined with reality. In this way, students can use the time saved to learn more knowledge and strengthen the cultivation of students' ability to integrate theory with practice and operational skills.