Your teaching goal is to start driving with a hundred hands;

Ask the students to count the number of objects with the number 3 correctly, and read and write the number 3.

Understand the order of numbers within 3, compare the sizes of numbers within 3, and know "

Teaching focus:

Understand the meaning of 3 and master the composition of 3.

Teaching difficulties:

Write the number 3 normally.

Teaching process:

Students, we met two digital friends last class. Do you remember them? Display cartoon digital cards 1 and 2 respectively.

Students read: 1, 2.

Q: Do you remember what 2 is made of and what it is?

Teacher: We have already met two digital friends, and there is another digital friend who wants to see you today. Guess who it is?

Student: Section 3: Yes! It's 3. Today, let's meet 3.

Understanding of 3 2. Learn new knowledge 1 and understand the practical significance of 3. Observe the theme map (show picture 3) Q: What is drawn on the map?

How many aunts are there? How many TVs?

Teacher: Three aunts and three televisions can all be represented by the number 3. Q: Look, what does 3 look like? Can you still tell me where there is a 3 in your life?

Students give examples.

2. Learning tools Operate students to make a triangle with three sticks.

Q: 3 How many 1 are there?

Teacher's demonstration 3: Dial 2 beads first, then 1 bead.

Q: What is two plus 1?

Ask questions while demonstrating: What is three minus 1?

What comes after 2? 3 What's ahead?

Students read in order: 1, 2, 3.

Read backwards: 3,2, 1.

3. Compare the sizes of 2 and 3 and display the block diagram: 2 blocks on the left and 3 blocks on the right.

Q: 2 and 3, what was the result?

Teacher: 2 is less than 3, that is, 2 is less than 3, and the middle of 2 and 3 should be connected with a "less than sign", and the word "

Students practice reading.

Teacher: If these two pictures are interchanged, what symbol should be used to connect 3 and 2?

Q: ">" and "

Teacher: We can use our right hand to help us remember ">" Use our left hand to help you remember "

4. Composition of teaching 3 Operation of learning tools: How many ways are there to put three sticks in two piles? After the operation, the students talked to each other.

Q: What are the similarities and differences between these two styles?

Health: The same thing is that they are divided into two parts: 1 and 2.

The difference is that the positions of 1 and 2 are different.

Students practice the composition of Speaking 3:

5. Instruct students to write "3" demonstration courseware. 5. Complete the red picture of Tian Zige on page 9 of the textbook.

6. Consolidation exercise 1, fill in the blanks:

Students complete 1 and 2 questions in Exercise 2 on page 13 of the textbook.

2. Teachers and students talk about the composition codes of 2 and 3.

3. Fill in 1, 2, ().

3、()、 1。

Practice writing Students complete the third question in Exercise 2 on page 13 of the textbook.

7. Class Summary Teacher: What did we learn today? What have you gained?

The addition design intention of Learning 2:

Computing activity is a relatively boring and abstract subject. In order to let children better master what they have learned, we must grasp their psychology and know what they like. What do you like? In an accidental animation activity, children became interested in Snow White and other animations, especially the castles and palaces where they lived, imagining that they could live in them, so I designed the activity of "Learning Addition 2" to let children talk while holding it, so as to realize their satisfaction and provide space for children to explore independently.

At the same time, group cooperation and learning can make children feel and experience the fun of computing, choose their favorite expressions, and protect their enthusiasm for independent discovery.

Activity objectives:

1, create a situation for children to try to list the addition formula with the number 2 in the operation process and understand the meaning of the plus sign and the equal sign.

2. The quantitative relationship expressed by perceptual addition formula.

3. Experience the fun of games in activities and improve children's interest in learning mathematics.

Activity preparation:

Material preparation:

A picture of the castle (three floors) Floor 1: Fish pond Floor 2: Garden Floor 3: Fruit shop (1 tropical fish+1 goldfish = 1 tropical fish 1 goldfish) Figure 2. Children's operation materials (+,=40,No. 65438+)

Train Game: Review Composition 2 "Kid, today a king wants to invite us to his castle. Let's get on the second train and set off quickly. Boo-hoo, the train is coming! " Teacher: "Hey, my train 1 leaves. What time does your train leave?" Yang: "Hey, your train 1 leaves, so does mine." Second, climb the castle, look at the picture and learn to add 2 1, and create a situation (1) "Look at the castle kingdom, children. (Show the castle map) How many floors is the king's castle? (Third floor) Wang heard that the children in Class Two are very clever. If we are to be tested, the problem lies in the castle. Let's climb the castle quickly. " "Look, the first floor of the castle, what's the matter? (Fish) How many fish are there? (1) Today we also brought 1 fish for the king. Let's put it in. How many fish are there in the castle now? (2) Oh, the original 1 fish was added with 1 fish, and our fish became two fish (the teacher's tone was slow). Who will talk about it again (please talk about 3-4 children)? (2) Understand "+,=" Then we will put them together with a symbol (show+). Do you know that?/You know what? (Children I know give praise)'+'is very useful. It wants to combine 1 fish with 1 fish. Let's put it in the middle. Who will find its position (please 1 children operate on the blackboard)? What does the plus sign mean? (After several children answered, the teacher and the children summed it up together. ) summary: the plus sign combines the previous number with the latter number and puts it in the middle.

"Now there are several fish (2 fish) in front. We put the fish in front of this box and the fish in the back of another box. Look carefully, children. What little secret did you find? " (as much) "that is, equality, and we also use a symbol to express it. Its name is' equal sign'. Who will find its location? (Let the children try) What do you mean by' ='? " Summary: the result of the first two numbers of the symbol is equal to the number after the symbol.

"Now we use numbers to represent all the small fish, and we should also use"+"and" = ". Who will try? He worked out a formula with figures. Can you explain the meaning of this formula? (Let the child talk about it) (3) The child hands-on operation "The child is amazing. Let's go and see the castle on the second floor. What's there? How many kinds of flowers are there? (1 planting flowers) In order to welcome us, the king sent someone to buy 1 planting flowers to decorate his garden. How many kinds of flowers are there in the garden now? Please use your head and tell me your result in a formula. There should be numbers 1, 1, 2 in the formula. Remember to use'+,=' to list the formulas and put them in place. "(4) Share and communicate" Who will tell us how you put it? Now, the teacher will give you 2 minutes to talk to your friends next to you about how you set it up. "Third, internalization and migration-game: buying fruit" said the king. These little guests are really smart. Now the king wants to invite the children to come to me with fruit coupons on the table in exchange for fruit. Every little guest has two fruit coupons and one fruit coupon for different kinds of fruits. Now the little guests can eat fruit. "