First, create teaching situations to stimulate students' interest in learning. The success of classroom teaching is mainly marked by the level of teaching efficiency, and the level of teaching efficiency often depends on whether students are active in teaching activities. With full interest in learning, children will have a strong demand for learning, actively participate in learning, and persistently struggle with difficulties in learning, and no longer feel that learning is a burden. Using multimedia technology in teaching can create a good teaching situation, deepen students' sensory stimulation, firmly grasp students' attention, stimulate students' interest in learning, and play a multiplier role in education and teaching activities. For example, when I was teaching Jiao Yuan, I used some animals, vehicles and electric toys that students liked to see and hear to stimulate their curiosity. Design a "buying and selling situation" so that they can buy in joy, recognize in joy, recognize in middle school and remember in study, so that students' perceptual knowledge and rational knowledge can be organically integrated, and direct experience and indirect experience can be closely linked.
Second, make rational use of animation, strengthen perception and promote the transformation of knowledge from concrete to abstract. Mathematical concepts abandon the support of concrete images and sublimate into abstract words, which are not easy for students to accept. Using traditional teaching methods, it is impossible to clearly show or observe the exhibition process. However, multimedia technology combines sound, light, color and action. In teaching, we can make full use of the functions of flashing, moving and deformation of multimedia, so that students can easily and efficiently understand the connotation of concepts in concrete and image perception. In the teaching of abdication subtraction by subtracting one from two digits, sticks first appeared on the computer screen at 23-8. How to subtract eight from two bundles of three? Students can operate by themselves first, try how to do subtraction, and then click the correct answer. The screen appears: two bundles of three sticks and a bear appear on the screen. According to the method proposed by the students, the bear took apart a bundle of sticks and connected them with three sticks. The bear talks while doing it, plus appropriate sounds and music. In this process, students can personally operate and witness the process. The key to understanding the abdication subtraction of two digits MINUS one digit is to borrow one from the last one if it is not enough, and add one digit to ten and then subtract it. In a series of dynamic processes, students can repeatedly operate and grasp the key points, so as to draw correct conclusions, learn knowledge and complete teaching tasks. This link, with the help of multimedia color, flicker, sound and animation demonstration, can not only stimulate students' interest in learning, but also help students form representations, promote the transformation of knowledge from concrete to abstract, inspire thinking and improve classroom teaching efficiency.
Third, break through teaching difficulties and improve classroom teaching efficiency. In mathematics classroom teaching, the flexible and reasonable use of multimedia courseware to assist teaching has solved some teaching emphases and difficulties. As we know, in the lesson of circle area, the key to deduce the formula of circle area is to transform a circle into a rectangle, and "turning a circle into a square" is a difficult point for students to understand. Traditional teaching methods such as physical display can never solve the problem well, but it is easy to show all the difficulties with the help of multimedia computers! 1, put the circle 16 into an approximate parallelogram, and then flash the upper side of the approximate parallelogram to highlight the bending feeling and emphasize that it is an "approximate" parallelogram. 2. Divide the circle 32 into an approximate rectangle, and then compare the upper side of the approximate rectangle with the front side, and then make it straight. 3. Divide the circle 64 into an approximate rectangle, and then compare the upper side of the approximate rectangle with the front side, and the figure is getting straighter and straighter. Through the demonstration of the above three levels, students can find that the more copies of the media animation splicing process, the thinner each copy, and the more rectangular the splicing graphics, with the gradual approximation method and the timely guidance of teachers. Implementing transformation in operation not only permeates students' extreme thoughts, but also develops students' concept of space. This dynamic and intuitive transformation process effectively reduces the learning difficulty of students.
Fourth, increase the classroom capacity and feedback students' learning information in time. To reduce students' academic burden, it is necessary to increase the teaching density of 40 minutes in class and improve teaching efficiency. To form good mathematical skills, students need multi-level, open and practical exercises. In classroom practice, teachers closely link mathematical problems with real life, and through multimedia intuitive demonstration, students can understand the meaning of problems more deeply and clearly, and solve problems smoothly and flexibly, thus improving students' problem-solving ability. For example, how many times is a number known? How to find this number? " In my classroom practice, I designed such a set of topics: the computer shows bright and vivid pictures in light music, creating a situation in which a little green baby gets lost and finds her home. Every baby has a problem, and every lotus leaf has a formula. Which lotus leaf is used to solve the problem of Qingwa, and which lotus leaf is Qingwa's home. Let the students discuss with each other in the same place, and then nominate students to operate the mouse to help Qingwa find her home. Here, the human-computer interaction technology is used to set the target response function. If the students find the wrong one, the media will respond immediately and come back if they find the wrong one. Qingwa returns to her original position, and if she finds a suitable one, she will immediately give affirmation and encouragement. Here, give full play to the advantages of multimedia technology, create situations according to children's characteristics, fully mobilize students' learning enthusiasm, improve students' interest in learning, let students play middle school at school, and achieve the effect of consolidating new knowledge easily and happily. For example, in the teaching of parentheses, there is a question to judge whether the operation order of 8+ 12-5= 15 and 8+( 12-5)= 15 is the same. After students begin to operate, judge whether it is true or not, and then demonstrate CAI software with multimedia computer to guide students to think step by step. In addition, students can choose the direction of learning according to their own judgment, the content and progress of learning according to their acceptance, and solve various problems given by computers independently. Because students selectively take the initiative to acquire knowledge and discuss the issues they are interested in deeply, they not only develop their intelligence, but also their personality.
Because the result of the question is open, I design the possible answers to be interactive and respond flexibly according to the students' answers, thus effectively cultivating students' divergent thinking and creative thinking and promoting their active development.
In a word, with the rapid development of science and technology, computers will play an increasingly important role. Computer-aided instruction in classroom teaching can make teaching intuitive and vivid, and improve learning efficiency. As long as we teachers work hard and keep exploring, we can make full use of multimedia, a modern teaching method, while giving full play to the role of traditional educational media, and strive to create a positive, happy and intelligent teaching situation, so as to better combine students' emotions and cognition, feelings and understanding, hands-on and brains, learning subjects and teachers' guidance, and promote the all-round and harmonious development of students' mathematical intelligence.