1, guide children to eliminate the interference of external factors (color, size, spatial arrangement, spatial distance) and understand the conservation of numbers within five years' experience.

2. Cultivate children's interest in logarithm, thus developing children's thinking and imagination.

Teaching emphasis: initially let children perceive the conservation of numbers.

Teaching difficulties: using different methods to verify the conservation of numbers.

Teaching preparation: 1, scene performance (the same number, different sizes, causing two small animals to quarrel), please ask the children in the middle class to perform.

2. Courseware (making flowers of different sizes, colors and arrangements)

3. Operating material: triangle (2 colors and sizes) made of cardboard.

Teaching process:

First, the topic, the use of situational performance

(Ask two children in the middle class to perform and describe. There are two small animals and two laundry baskets, one big and one small. There were a lot of things in the laundry basket, and then there was an argument. )

Question: Why do you think the children quarrel? Let the teacher see what can be done to help.

By introducing the conservation of numbers, the teacher can draw the conclusion that although the laundry list is different in size, the number of things contained in it is the same. )

Second, the number of learning is conserved.

1, watch the courseware

(1), show two flowers of different colors for children to observe. What is the difference? Count whether the numbers are the same.

Summary: The colors of the flowers just now are different, but the number is equal, all five.

(2) Show two pictures with different sizes for children to observe first. Question: How many big ones are there? How many small flowers are there? Besides the color, where else is the same?

Summary: a big number is the same as a small number, both are 5, so it doesn't matter if the numbers of things are different.

(3) Show four pictures arranged in different lines for children to observe. What's their difference? Where is it the same?

Summary: Although they queue in different ways, their number is still the same, five.

Third, children's operation

(1), the teacher told the children how to operate, each child can only take five graphics babies to form different shapes of graphics.

(2) Please choose a good one from each group and show it to the children before the projection. Let him speak for himself. (one's own plan)

Fourth, the teacher summed up

The representatives selected by the four groups of children just now are all great, and they are all displayed in different ways. In fact, there are many things in our life with different colors and sizes, but the quantity is the same. Let's take you to them.