First, create a situation to stimulate interest
Multimedia has special sound, light, color and shape, which gives students a novel and exciting feeling through the tumbling, flashing, freeze-frame, color change and sound effect of images. Using multimedia-assisted teaching to create vivid and interesting teaching situations can fully stimulate students' interest in learning and thirst for knowledge, integrate knowledge learning into novel and unique forms of entertainment, and make boring learning relaxed and happy. For example, in the lesson Axisymmetric Graphics of PEP 1 1, the vivid colors and beautiful patterns of multimedia can be used to visually reproduce things and give students the feeling of seeing with their own eyes. Teachers can use multimedia to design three patterns: isosceles triangle, plane and Great Hall of the People. After showing them one by one, the symmetry axis is displayed with red lines, so that students can observe and feel the essence of this kind of graphics. The image display is vivid, rendering atmosphere and creating artistic conception. Students learn, think, understand and remember with great interest, which mobilizes their "internal drive" to the greatest extent.
Second, highlight the key points and present the process.
The key in the process of mathematics teaching is to let students master the formation process of knowledge and let them know what it is and why. The application of multimedia teaching can reproduce all the contents involved in teaching, such as image and process, make the teaching process vivid, clearly present the imperceptible things within the reach of students' sensory ability, highlight key points and break through difficulties. For example, in the course of "Understanding Corners", it is an important content to teach students how to draw corners. Teachers draw pictures on the blackboard with traditional teaching methods, which has certain disadvantages. For example, students are absent-minded, teachers draw pictures and some students don't pay attention; When the teacher draws, his body blocks the sight of some students and so on. However, when multimedia is used to assist teaching, the situation is quite different. You can use multimedia to demonstrate the steps and basic methods of drawing corners first, because the multimedia demonstration is novel, students pay attention and leave a deep impression on them. After the demonstration, the teacher will demonstrate drawing corners on the blackboard, and finally let the students draw corners independently. This teaching process design meets the psychological needs of students, which makes students clear the method of drawing corners and has good teaching effect.
Third, human-computer interaction, training ability
Multimedia can not only display information and enable students to acquire knowledge, but also help students develop their intelligence and talents by using knowledge and technology. We know that there are some differences in students' learning objectively, so it is necessary to recognize and respect individual differences. Multimedia-assisted teaching can adapt to personalized teaching. In the arrangement of teaching software, teachers can design various ideas and problem-solving methods for different types of students, so that students can choose independently and cultivate their decision-making ability. Such human-computer interaction, quick feedback and audio-visual integration. Students have changed from simple lectures and boring book exercises by teachers to computer operation and dialogue with computers, which fully mobilized students' learning initiative, improved learning efficiency and developed their learning ability. For example, when teaching the course "Understanding the Circle", there is such a question in the exercise: Why do you want to make the wheel round? Where should the axle be installed? I asked the students to discuss in groups, and it was difficult for them to make it clear. At this time, I said: if it is made into a triangle, a square or an oval wheel, is it ok? What will happen to the little monkey sitting in a car with these wheels? When students want to say something unclear and can't stop, multimedia first shows three groups of pictures. Seeing the little monkey sitting in the car with triangular, square and oval wheels, jumping up and down, the students all laughed. Then a fourth group of pictures appeared. The little monkey was sitting in a car with round wheels, flat and steady. In order to better reveal the essence of the problem, finally, four cars are moving on the screen at the same time, and the axle movement tracks left by the wheels have broken lines, wavy lines and straight lines. Compare several groups of different pictures, so that students can clearly understand where the axle is installed. In the interactive environment such as multimedia, students can choose what they want to learn according to their learning foundation and interests. This kind of active participation creates good conditions for students to play their initiative and enthusiasm, which truly embodies the spirit of the new curriculum standard: students are the main body of learning and the master of learning.
Fourth, cleverly set questions and be active in thinking
The problem is the heart of mathematics. With questions, students' thinking has direction and motivation. Using multimedia and other modern teaching methods to create problem situations, activate students' thinking, inspire students' divergent thinking and intuitive thinking, and promote the development of students' creative ability. For example, in the teaching of deriving the formula for calculating the area of a circle, students cut the circle in groups, and some cut it into an approximate rectangle; Some put round scissors together into an approximately flat quadrilateral; Some put round scissors into an approximate triangle; Others put round scissors into a trapezoid. Students use different methods to derive the calculation formula of circular area from different angles. In this process, students can taste the fun of independent thinking and cultivate their divergent thinking ability. The students were immersed in the joy of victory. The general teaching of deducing the formula of circular area is over here, but the teacher didn't stop there, and asked, "What kind of figure is the easiest combination of circular scissors?" The teacher's questions pushed the students' thinking interest to a climax. At this time, the teacher gave full play to the advantages of multimedia courseware and showed various methods to deduce the formula of circular area one by one. The students quickly summed up the simplest method and explained the reasons. In this way, students can know not only what it is, but also why. Raise students' thinking to a new height.
In short, we aim at improving teaching efficiency in teaching, and skillfully using multimedia-assisted teaching can better improve students' learning ability.