Through observation and operation, we can classify the items according to the specified goals or user-defined goals, and compare the quantity, size, height, length, distance, width and thickness of the items. Let the students form the preliminary observation, analysis and comparison ability in the activities of dividing points and comparing. Under the guidance of the teacher, find and put forward simple mathematical problems about classification and comparison in daily life, and can report and communicate preliminarily. Through the process of classification and comparison, I feel the close connection between mathematics and life, and initially develop the habit of sorting things out. The passive cognition of children makes the whole class very boring and the children are not interested. Therefore, when designing this course, I want to use a series of games to let children learn while playing, such as "finding homes in groups", "finding homes for boys and girls", "Little Flower Mountain" and "beautiful seaside", one after another, so that children can finish it when they are novel, which not only mobilizes their enthusiasm but also ensures the knowledge they have learned in the process of playing.

Teaching objectives:

1, through observation and calculation, we can classify items according to the prescribed standards or user-defined standards, and compare the size, height, length, distance, width and thickness of things.

2. Let the students form the preliminary observation, analysis and comparison ability in the activities of point-by-point comparison.

3. Under the guidance of teachers, simple mathematical problems about classification and comparison can be found and put forward in daily life.

4. In the process of classification and comparison, I feel the close connection between mathematics and life, and initially develop the habit of sorting things out.

Teaching material analysis:

The textbook of this unit selects the living environment scenes that students are used to as the basic material. Through the activities of helping mothers arrange and store clothes, students are inspired to learn to classify and compare in hands-on practice and cooperative communication with the help of existing life experience, thus linking mathematics knowledge with students' real life. The information window is to help my mother sort clothes. Through the dialogue between mother and child, I can inspire students to use their own experience to learn how much, size, weight, thickness, height and so on. I learned how to compare the distance and width in a column, so as to widen and consolidate it.

Analysis of the situation of school students:

The school is located in the city, and the classrooms are equipped with multimedia. Students can participate in this kind of learning activity by using courseware. Students also have some life experiences at home, which are basically similar to the life scenes in textbooks, so it is not too difficult to classify the size of children's existing life experiences.