This textbook includes the following contents: understanding and addition and subtraction of decimals, understanding of figures, multiplication of decimals, observation of objects, division of decimals, fairness of games, understanding of equations, etc.
The understanding, addition and subtraction, multiplication and division of decimals and cognitive equations are the key teaching contents of this textbook.
(a) Number and Algebra field
1, unit 1 "Understanding and addition and subtraction of decimals". On the basis of learning "Yuan, Angle, Minute and Decimal" in the second volume of Grade Three, the understanding of decimals is expanded, and decimals are initially linked with fractions to further understand the meaning of decimals. Combined with the specific situation, learn the mixed operation of decimal addition and subtraction and addition and subtraction, use decimal addition and subtraction to solve some problems in daily life, and feel the close connection between decimal and real life.
Unit 3 "decimal multiplication" Combined with specific situations, let students understand the significance of decimal multiplication, experience the process of exploring the calculation method of decimal multiplication, master the calculation method of decimal multiplication, and use decimal multiplication to solve simple problems in life.
Unit 5 "Fractional Division". This unit includes decimal division, product quotient approximation, cyclic decimal, decimal elementary arithmetic, etc. Combined with the specific situation, I experienced the process of exploring the calculation method of fractional division and experienced the mathematical thought of reduction. Understand that sometimes in life, you only need to ask for the approximate value of the product quotient, master the method of finding the approximate value, and cultivate the consciousness of estimation. Have a preliminary understanding of cyclic decimals, and use four decimal operations to solve simple problems in daily life.
Unit 7 Understanding Equation. Let students understand that numbers can be represented by letters in combination with life scenes. Understand the equation preliminarily through intuitive teaching AIDS; Through game activities, we can get a preliminary understanding of the properties of the equation, and we can use the properties of the equation to solve simple equations.
(b) "Space and Graphics" field
1, Unit 2 "Understanding Graphics". Sort out some figures learned through classification activities; Through the classification of triangles, we can understand the characteristics of various triangles; Through calculation, it is found that the sum of the degrees of the three angles of the triangle is equal to 180 degrees, and the sum of any two sides of the triangle is greater than the third side. Further understand the characteristics of parallelogram and trapezoid; Will use the learned graphics to design some simple patterns.
2. Unit 4 "Observing Objects". Be able to identify the pictures taken by different observation points of high and low, far and near and their sequence; Through practical observation, students can realize that the same scene is in different positions and the pictures they see are different; Be able to identify photos taken from different locations and their sequence.
(c) "Statistics and Probability" field
Unit 6 "Fair Play". Through games, students can experience the possibility and fairness of the rules of the game. Can design fair and simple rules of the game.
"Comprehensive application" field
In the teaching content of each unit, this textbook is equipped with practical problems and practical activities, and the presentation form is real and interesting. In addition, three special activities are arranged, namely, knowledge in numbers, passionate Olympics in numbers and laws in numbers, so that students can comprehensively apply what they have learned to solve practical problems.
Second, the teaching objectives
The teaching goal of this textbook is to enable students to:
1, understand the meaning and nature of decimals, experience the application of decimals in daily life, further develop the sense of numbers, master the law of decimal size change caused by decimal position movement, and master the addition and subtraction operation of decimals.
2. Knowing the characteristics of triangles, we classify triangles according to the characteristics of sides and angles. We know that the sum of any two sides of a triangle is greater than the sum of the third side and the inner angle of the triangle, which is 180.
3. Master the operation method of decimal multiplication and division, calculate decimal multiplication and division, and solve some simple practical problems.
4. Learn some simple statistical methods.
5. Understand and solve equations, and use equations to solve some practical problems.
6. Learn relevant knowledge about graphics and develop the concept of space by combining life situations and exploration activities.
7. Experience the process of finding, putting forward and solving problems in real life, understand the role of mathematics in daily life, and initially form the ability to solve problems by using mathematical knowledge comprehensively.
8. Understand the idea of logistics initially, cultivate the consciousness of discovering mathematical problems from life, and initially form the ability of observation, analysis and reasoning.
9. Experience the fun of learning mathematics, improve the interest in learning mathematics, and build confidence in learning mathematics well.
10, form a good habit of doing your homework carefully and writing neatly.
Thirdly, the analysis of learning situation.
This semester, there are 55+53 people in Class 4 (1) and Class 2 (2) I teach, including gay men and lesbians. These students are lively, cheerful and enthusiastic, and sometimes they are mischievous because of excessive enthusiasm. Their self-control ability and persistence in class are poor, and unintentional attention occupies an obvious position in class. Therefore, it is easy to be distracted in class and love to do small moves. The students in this class have poor math study habits. Many students haven't formed the routine habits of previewing before class, speaking in class, reading review questions, doing homework and reviewing, so the learning atmosphere of the whole class seems to be very chaotic. Nevertheless, several students in this class showed unusual diligence, such as Feng Yuxing, Luo Xu and Tang Ruibing. Therefore, in addition to cultivating students' regular class habits this semester, we should also pay attention to strengthening students' good self-study habits, writing habits and expression habits.
Fourth, teaching measures.
1, the latest mathematics teaching plan for the fourth grade of primary school: pay attention to finding the connection point between mathematics knowledge and real life experience, take the prototype of life as the entrance, and strive to create a structural model of "problem situation-problem solving-extended application".
2. Design open teaching activities, so that students can feel and appreciate the formation process of mathematical knowledge through activities.
3. Pay attention to the teaching of calculation, reflect the diversity of algorithms, allow students to use their own methods to calculate, and at the same time strengthen the optimization process, guide students to compare, reasonably choose algorithms, and appropriately strengthen.
4. Provide rich, realistic and exploratory learning activities, stimulate students' interest in mathematics, and gradually develop students' mathematical thinking ability and innovative consciousness.
5, continue to strengthen the calculation training, gradually improve the ability of oral calculation, and increase the teaching of estimation.
6. Take a variety of evaluation methods to stimulate students' enthusiasm for mathematics, such as listening to small experts and thinking about small experts to cultivate students' good study habits and methods.
7. Excavate the humanistic factors in teaching materials, reflect the cultural value of mathematics, and subtly influence students' emotions, attitudes and values.
8, according to the teaching materials, combined with students' actual level, create practical activities, cultivate students' comprehensive application of knowledge to solve problems.
9. Integrate the cultivation of mathematical problem-solving ability into the teaching of various knowledge points. Through observation, operation experiment, guessing, reasoning, communication and other activities, I feel the wonder and function of mathematical thinking method initially, and am trained by mathematical thinking, and gradually form an orderly and rigorous thinking consciousness.
10. Integrate math stories into pre-class preparation, thus enriching students' knowledge of math culture and history.
Five, comprehensively improve the quality of students.
1. According to students' age characteristics and existing experience, flexible and effective teaching forms, such as situational method and game method, are adopted to guide students to participate in mathematics learning activities.
2. In classroom teaching, we should pay attention to the artistry of asking questions, consider the differences of students' thinking, face the whole class, and especially take care of middle school students and students with slow thinking.
3. Strengthen the connection between school and family education, give parents some correct methods to guide their children's learning and promote the formation of educational synergy.
4, homework layout should be timely and appropriate, pay attention to fun and hands-on operation, avoid boring, large quantity.
5. Grasp the teaching requirements, promote students' development, improve the methods of evaluating students, and evaluate students from a developmental perspective.
6. Pay attention to the selection of learning materials and activities that are full of children's interest, stimulate students' interest in learning, make students have a pleasant learning experience in mathematics, and help children build confidence in learning mathematics.
7. Experience the formation of knowledge, gradually learn the thinking method of mathematics, and gain the experience of self-success, thus enhancing the confidence of learning mathematics well.
8. Strengthen oral calculation practice, communicate written calculation, oral calculation and estimation, and promote each other.
9. Get into the habit of doing your homework carefully and writing neatly.
10, pay attention to reflect on the process of exploratory learning and cultivate students' awareness of exploration and innovation.