1, learn how to divide a body into four parts, and further understand the meaning of division and the relationship between the whole and the parts.

2. Learn to divide geometric figures in different ways to develop children's thinking ability and hands-on ability.

Second, study preparation:

A round, a square and a rectangular piece of paper.

Third, the learning process:

1, show the round paper and ask the children: The teacher wants to divide this round paper into four equal parts. How to divide it among the four children? After the children answered, the teacher demonstrated the quartering of the circle by folding in half, and divided it into four small sectors to overlap for the children to compare. Ask the children: Are the four small sectors the same size?

2. Ask your child: How do you divide a thing into four equal parts through graphics? Four equal portions. Let the children understand the meaning of four equal parts.

3. Ask the children: What shape will these four small sectors be together? Is the assembled circle as big as the original one? Same size. Is each small sector bigger or smaller than the circle? Ask questions and compare them with children, so that children can further understand the relationship between parts and the whole and know that each small sector is divided into four equal parts.

4. Show the square paper and ask the children how to divide the square paper into four equal parts.

(1) On the basis of children learning to divide into two parts, inspire children to divide square paper ears into four parts first, and then divide each ear into four parts.

(2) Know that children fold square paper and do four equal exercises. Let the children think of different points as much as possible and talk about how they divide them.

(3) Ask children to cut out four equal parts of various methods and compare them with parts, parts and the whole.

5. Show me the rectangular paper. Ask the children how to divide them into four equal parts.

Follow the steps of four pieces of equilateral paper and guide children to practice four equilateral rectangles. Remind the child to align the corners when folding, and cut straight according to the folding line when cutting, to check whether the child operates correctly.

6. The children do the exercises on page 24 of mathematics.