I. Activity objectives:

1. Let children know the mathematical symbols ">" and "

2. Let children further perceive the difference between ">" and ".

3. Develop the flexibility and reversibility of children's thinking.

Second, the activity preparation:

1. 2 frogs with big mouths and 2 lotus leaves.

2. Draw two pictures: one is a picture of six flies and three flies, and the other is a picture of five mosquitoes 15 mosquitoes.

3. Put the sign "> 10" on the red house and "< 10" on the green house; Some digital cards of 1~50.

There are several title cards, and the numbers ">" and "

Third, the activity process:

1. Rhythm concentrates children's attention and leads to the topic.

Teacher: Today, the teacher told the children a riddle. Please guess what animal it is. Big eyes, big mouth, croaking, eating pests.

Teenager: Frog.

Teacher: (showing the frog) What kind of frog is this?

Young: A frog with a big mouth.

Teacher: Yes, it is a frog with a big mouth. (The teacher imitates the frog's voice) Hello, children! I'm a frog with a big mouth. I eat pests to protect traffickers. Now I want to see where there are pests.

2. Guide children to know numbers ">"

Show me a picture:

Teacher: Buzz, who are you? This is the fly that our children hate most. Who can tell me how many flies are in the first row?

Young: 6.

Teacher: Then let's use the number 6.

Teacher: How many flies are there in the second row?

Young: 3.

Teacher: Then let's use the number 3.

Teacher: Gollum, what's that noise? It turns out that the frog's stomach is barking, and it wants to eat pests. (imitating frog's voice) Three flies are not enough to eat. I want to eat more. Look at the first row, then at the second row. Which row has more flies?

Yang: There are many flies in the first row.

Teacher: The child is really clever. I want to eat them when I grow up.

Teacher: Now the frog with big mouth will jump on the lotus leaf and eat the flies in the first row. Who will help it? I'm going to let a child stick a frog with a big mouth on the lotus leaf to eat flies.

Teacher: The big-mouthed frog has become a bigger than sign. (display > numbers)

Teacher: It means that the number symbol is greater than the symbol. Read from left to right: 6 > 3.

3. Guide children to know "

Show me drawing 2:

Teacher: The big-mouthed frog ate a lot of flies, was full and had a good sleep. The next day, the frog with big mouth began to catch pests again. Who did he catch? (showing mosquitoes)

Teacher: Please count the mosquitoes in the first and second rows. (Row 1 5, Row 2 15)

Teacher: Five mosquitoes are represented by the number 5, and 15 mosquitoes are represented by the number 15. Mosquitoes are not enough to eat. I want to eat more and more.

Teacher: Who can help the big-mouthed frog jump on the lotus leaf? Please stick the frog on the lotus leaf accurately.

Teacher: Children learn its big mouth by hand. The frog with a big mouth changed and made a gesture of less than. (Show < sign) indicates that the number symbol is less than the symbol. Read from left to right: 5 < 15.

4. Digital games

Teacher: The red house is the home of digital babies larger than 10, and the green house is the home of digital babies smaller than 10. Show me again and post the numbers 12 and 9 in the red house and the green house respectively. )

Teacher: There are still many digital babies who have not found a home. Please help them.

Children operate, teachers check right and wrong.

5. Question card practice

Teacher: The big-mouthed frog has also prepared many cards, some are larger than the number, and some are smaller than the number, to show the children which children can calculate quickly and accurately.

The child operates, and then the teacher and the child check right and wrong together.

6. Effect analysis

In this activity, let the children understand and master the greater than sign and the less than sign through the frog's big mouth, and distinguish the opening direction of the greater than sign and the less than sign. In the game of finding a home for numbers, the children reviewed the numbers greater than 10 and less than 10 in the learning operation. In the card-lifting exercise, in order to improve experience, children fill in the corresponding numbers greater than and less than, find out the corresponding numbers and post them, and then they are interested in posting them.