Grasping the characteristics of rectangles and squares, draw rectangles and squares on grid paper; Knowing the meaning of perimeter, we can calculate the perimeter of rectangle and square; The length of some objects can be estimated and measured. 5. Understand the length units of millimeters, decimeters and kilometers, and initially establish the length concepts of 1mm, 1mm and 1km, knowing that 1cm =1mm,1mm =/kloc-. Understand the quality unit ton, initially establish the quality concept of 1 ton, know the simple conversion of 1 ton = 1000 kg, and select the unit appropriately; Knowing the time unit of seconds, the concept of minutes and seconds is initially established, and knowing that 1 minute =60 seconds, some simple calculations are made on time.

6. Understand the meaning of "multiple" and master the practical methods of "how many times one number is another" and "how many times one number is".

7. Students will solve simple practical problems by intuitive use of collective thinking methods.

(B) Mathematical thinking

1. Experience the inner connection between mathematical knowledge, feel the connection between mathematics and life, initially experience collective thinking and gradually form the concept of space.

2, combined with practical problems in life, flexible use of mathematical knowledge to solve problems in life.

3. According to the specific situation, through intuitive operation, we can initially understand the meaning of music score and realize the necessity of learning music score.

(3) problem solving.

1. Experience the process of finding, asking and solving problems from life, the close relationship between mathematics and daily life, and the role of mathematics in daily life.

2. Understand that there are different solutions to the same problem.

3. Have experience in solving problems in cooperation with classmates.

4. Initially learn to express the general process and results of solving problems.

(d) emotions and attitudes.

1. With the encouragement and help of others, I am curious about some things related to mathematics around me and can actively participate in vivid and intuitive teaching activities.

With the encouragement and help of others, I can overcome some difficulties in math activities, gain a successful experience and have confidence in learning math well.

3. Experience the process of learning mathematics such as observation, operation and induction, and feel the rationality of mathematical thinking process.

4, under the guidance of others, can find mistakes in mathematics activities, and correct them in time.

5, experience the fun of learning mathematics, improve the interest in learning mathematics, and establish confidence in learning mathematics well.

6. Develop the good habit of working hard and writing neatly.

Four, the focus and difficulty of teaching

Teaching emphasis: addition and subtraction of numbers within 10,000; teaching difficulties of rectangles and squares: hours and minutes; understanding of rectangles and squares.

Five, specific measures to improve the quality of teaching this semester

1. Based on the age characteristics of students, gamification teaching is adopted to guide students to participate in mathematics learning activities.

2. In classroom teaching, pay more attention to the problems that are beneficial to children's understanding, rather than blindly difficult and extensive. We should consider students' actual thinking level, and pay more attention to middle school students and students with slow thinking.

3. Try to arrange some interesting homework, such as hands-on homework, and less boring exercises; In addition, for students of different levels, assignments with different difficulties are arranged.

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