First, contact with real life, stimulate students' interest and cultivate students' concept of space. Mathematics comes from life, and there is mathematics everywhere in life. In daily life, junior students first come into contact with all kinds of objects. There are many cuboids, cubes and cylinders in the building blocks they play with. Buildings, cartons, boxes, books, chimneys, etc. They initially established the images of cuboids, cubes and cylinders; The ball and table tennis they played gave them an intuitive impression of the ball. Therefore, students' understanding of graphics begins with three-dimensional graphics. In this way, in teaching, teachers make full use of students' life experience and design vivid, interesting and intuitive teaching activities to stimulate students' interest in learning.
Second, by observing the physical objects and hands-on operation, students' concept of space is established. Only by mastering the basic characteristics of graphics can students correctly distinguish the essential differences between various graphics. Variant training is an important way to deepen students' appearance in cultivating students' ability to read pictures. At the same time, only through training can students better distinguish the various factors of graphics and determine which ones are primary, essential and non-essential, thus making their representation clearer. For example, when teaching isosceles triangle, when students initially established the concept of isosceles triangle and understood its basic characteristics, I changed the shape, size and position of isosceles triangle in time for students to observe and judge, effectively consolidating their understanding and mastery of isosceles triangle.
Third, through observation and association, let students improve the concept of space. Observation and association are the main ways for primary school students to acquire the concept of space. In teaching, we should guide students to observe comprehensively, orderly and carefully, and at the same time pay attention to creating more associative scenes for students. For example, after learning basic graphics, let students spell out their favorite items or graphics with these graphics; Draw a beautiful picture; Cut it from the discount. From one figure to another, you can change a rectangle into a square, a trapezoid, a parallelogram ... What kind of figure can a rectangle become when a corner is cut off? Give full play to students' imagination and cultivate creativity. After learning the area calculation of the long square, ask the students to design a flower bed for the school and calculate the area of all kinds of flowers and plants. After learning the circumference of a circle, let the students design a bucket cover.