1. Explore the square quartering method and try to design different flower beds in four seasons.

2. In reading, speaking and posting, you can further feel the richness of flowers in the four seasons.

Activity preparation:

Various shapes of round and square flower bed cards, scissors, glue sticks, pictures of flowers in different seasons.

Activity flow:

First, import riddles

Long body length, yellow flowers, face to the sun, fragrant seeds. (Guess the name of a flower) (Sunflower) Yes, it is the sunflower that blooms in summer. This is my favorite flower.

What flowers do you like? In what season does it open?

Summary: Spring, summer, autumn and winter, flowers bloom, and all kinds of flowers decorate our city, making our life better.

Second, a quarter of the circular flower bed.

Divide the round flower bed into four parts with the same size and shape, and plant flowers of four seasons respectively.

1, collective discussion and demonstration

How to divide the round flower bed into four parts with the same size and shape?

Summary: The circular flower bed is divided into four parts with the same size and shape by folding it in half twice. A big flower bed becomes an average of four, which is called quartering.

2. Distinguish the flowers in four seasons

The circular flower bed is divided into four parts, and flowers of four seasons are planted.

Who can tell you which flowers are planted in the four seasons?

Summary: Spring, summer, autumn and winter, four seasons rotate, and every season is accompanied by flowers, which is really pleasant.

Third, the square flower bed is divided into four parts.

Divide the square flower bed into four parts and plant flowers of the four seasons.

1, child operation

ask

(1) Divide the flower bed into four parts and plant flowers of four seasons respectively.

(2) Divide several flower beds and try different dividing methods.

(3) Stop the music, stop the operation and concentrate on your work immediately.

Step 2 discuss

Key question: what shape does it become after quartering? How to divide it? Do you like the flowers in this flower bed? Why? We divided the square flower bed into four parts. How many points did we get?

Summary: Today we divide the square flower bed into four parts in different ways. Some are divided into four small squares, some into four small rectangles, and some into four small triangles. In the flower bed divided into four equal parts, the flowers of the four seasons bloom alternately, decorating our spring, summer, autumn and winter.

Activity expansion:

How is the triangular flower bed divided into four parts? What do you want to grow?

(diagonal folding, up and down folding, left and right folding, etc. )

Activity reflection:

Equal division is a mathematical activity in life, which is exploratory. The design of dividing mathematics activities should attach importance to children's original experience, give full play to children's initiative, let children explore the dividing methods of different shapes independently, and realize the cognitive balance and development in the interweaving of new requirements and old experience. The goal of this math activity is to learn the quartering method. Children in large classes are familiar with plane figures such as circles and squares, so it is feasible to divide the figures into equal parts. In the activity, through the introduction of riddles, stimulate children's interest and let them learn to divide into four parts. In the process of operation, encourage children to try and operate boldly. After the operation, let the children master the quartering method by observing and comparing. In this process, the children actively used their brains and came up with different views. During the whole activity, the children's observation ability and practical ability have been well developed by following the principle of easy first, difficult later and step by step.