Unit 1 cylinder and cone. Teaching material analysis This unit teaches on the basis of learning cuboids and cubes. It is the last stage of learning three-dimensional graphics in primary schools. The comprehensiveness of knowledge requires students' ability. Therefore, the basic knowledge of rectangle, square and circle is the cognitive basis of this unit. At the same time, the effective transfer of mathematical thinking methods plays an important role in the teaching of this unit. The textbook follows the development process of "feature-surface-subject" in compiling, which makes students' understanding of cylinders and cones gradually deepen and extends to the calculation of surface area and volume of hollow cylinders (steel pipes, gaskets, etc.). ) Transformation and analogy are commonly used mathematical thinking methods, and teachers should start teaching on the basis of students' existing knowledge and methods. Teaching materials pay more attention to the connection with real life and arrange more topics to solve practical problems, which is conducive to the consolidation of students' knowledge and the formation of skills. A remarkable feature of this unit in teaching method is to let students practice and explore actively, so that students can discover laws independently, acquire knowledge and improve their ability to study and solve problems in the process of cooperative exploration. Second, the teaching goal 1, know the cylinder and cone, master the characteristics of the cylinder and cone, and know the names of each part of the cylinder and cone. 2. Master the calculation methods of lateral area, surface area, volume and cone volume of cylinders, and calculate them correctly. 3. Through observation, comparison, operation, experiment and other practical activities, cultivate students' ability to acquire knowledge and solve problems, experience the process of knowledge acquisition and feel the connection between things. 4. Cultivate students' earnest, careful and responsible spirit and good study habits in combination with the teaching content. Iii. Teaching emphases and difficulties 1, with emphasis on the characteristics of cylinders and cones and the calculation of volume and surface area; Volume relation between cylinder and cone with equal base and equal height. 2. Difficulties: Solving the Sum of Surface Area and Volume in Practical Problems Unit 2 teaching material analysis Teaching Objective: 1. Have a preliminary understanding of the simple knowledge of statistics, be able to understand and analyze statistical data, learn to draw simple statistical tables, and draw simple statistical charts under the guidance of teachers. 2. According to the statistical analysis of relevant data, I have received a certain degree of national education and patriotic education. Teaching emphasis: Drawing statistics is the focus of this unit. Teaching difficulties: 1. Because of the complicated quantitative relationship involved, it is difficult to sort out the columns. 2. The difficulty of this unit lies in the variety of statistical charts, the complexity of drawing, and the difficulty in determining the figures on the vertical axis and the horizontal axis. Unit 3 teaching material analysis teaching goal: 1, understand the meaning and nature of the ratio, correctly calculate the ratio and simplify the ratio; 2, can apply the meaning of the ratio to find the scale of the plan, and can find the distance or actual distance on the map according to the scale; 3. Understand the meaning and basic nature of proportion, and correctly solve the proportion; 4. Understand the meaning of the positive-negative ratio and be able to correctly judge the size of the positive-negative ratio; 5, can apply the meaning of proportion, positive and negative proportion, and answer related application questions. Teaching emphases and difficulties: 1. The focus of this unit is to understand and master the meaning of ratio and the meaning of positive and negative ratio; 2. The teaching difficulty of this unit is about the determination of positive and negative ratio. Unit 4 teaching material analysis Teaching Objectives: 1. Make students systematically master the basic knowledge about integers, decimals, fractions, percentages, ratios and simple equations, and correctly perform the four operations of integers, decimals and fractions, so as to solve simple equations and further improve their calculation ability. 2. Mastering some common quantitative relations and methods to solve application problems can solve slightly complicated application problems independently, and further improve students' ability to solve application problems with arithmetic methods and equations. 3. Mastering the basic knowledge of geometry can calculate the perimeter, area and volume of some geometric shapes and develop students' concept of space. 4. Master some preliminary knowledge of statistics and be able to draw simple statistical tables. 5. Cultivate students' logical thinking ability and the ability to solve practical problems. Review key points: 1, elementary arithmetic of integers, decimals and fractions; 2, scores, percentage application questions; 3. Preliminary knowledge of geometry. Details can be found on the following websites:/content/101009/22/1705697 _ 59718511.shtml.