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Little Hedgehog's Necklace Middle School Mathematics Teaching Plan
As an excellent teacher, it is essential to compile teaching plans, which are helpful to accumulate teaching experience and continuously improve teaching quality. So, have you studied lesson plans? The following is the math teaching plan for the middle class of the little hedgehog necklace that I helped you sort out. For reference only. Welcome to reading.

Little Hedgehog's Necklace Middle School Mathematics Teaching Plan 1 Activity Target:

1, like picture book reading activities, and understand the content of picture books in appreciation and telling.

2. Try to classify items regularly according to their two characteristics.

3. Knowing and feeling sharing is a happy thing.

4. Develop children's logical thinking ability.

5. Let children learn simple math problems.

Activity preparation:

1, the necklace picture book courseware of the little hedgehog, a set of necklaces that the little monkey hasn't finished wearing.

2. Children's collection of porous bottle caps, abacus beads, porous building blocks and toys (classified bags) and shoelaces of waste materials that can be used for necklace stringing.

Activity flow:

Play the first picture of the courseware first to arouse children's interest.

The teacher invited a guest to the children's house today. Let's see who he is. He has a nice name called Raya. Let's listen to his story together!

Second, the teacher tells stories and asks related questions according to the content of the picture book. Lead out the sorted content.

Ask questions:

(1) Show the picture of the first page of the courseware. What happened to Raya the Hedgehog? (Observe the sad expression of the hedgehog and expand the child's imagination) Why are you sad? (Lonely)

(2) Do small animals like this Raya?

(3) What do you think you can do with these foods? (Divergent children's thinking)

(4) Let's see what the little hedgehog has turned these wonderful foods into. How are the beans arranged in this necklace? (Guide children to discover the arrangement law of ABAB)

(5) What will happen to other small animals when they see the beautiful necklace around Raya's neck?

(6) Small animals have picked up so many beans. Are these beans the same? What is the difference?

(Guide children to observe the color and size of beans)

Let's see what necklaces the small animals have made. (Observe the characteristics of necklaces respectively)

① ABC Law of Rabbit Necklace.

② The elephant's necklace is AABB by color and AABB by size, so as to guide children to combine the characteristics of the two to say regularity.

(8) What rule does the little monkey's necklace wear? Who will help the little monkey finish wearing this necklace? (size and color are AABBCC)

(9) Now all small animals like this little hedgehog. Why? The teacher concluded: Little Hedgehog shared his happiness with everyone. )

Third, children operate and feel the regular simple beauty of objects.

1, distribution materials:

Teacher: Today, laya will also share his happiness with every child. Look, he has prepared a bag of necklace materials and a necklace rope for each child. But can only one material wear a necklace as beautiful as a small animal? then what Ask the children to choose a bag of materials you like and find one or several good friends to share your materials. Put on your favorite necklace.

2. Requirements:

Wear a necklace according to your favorite rules.

(2) When wearing a necklace, handle it with care and don't spill it on the ground.

3. Teachers' itinerant guidance

Fourth, show children's works.

1. Ask individual children to show their works for evaluation.

Children share necklaces with each other and dance to the music.

Activity reflection:

This activity skillfully combines picture books with mathematics, and children's interest in learning is particularly strong, and the ability to share and cooperate is naturally integrated into it, giving people a wonderful feeling. This is the best math activity I have organized so far. Although it is quite successful, it still has some shortcomings. Now we will reflect on this activity as follows:

1. The children in our class have mastered ABAB and ABC in the small class, and have innovated many laws such as AABB and AABBCC. According to the development level of children in our class, I designed to learn to classify objects according to their two characteristics, so as to promote the further development of children on the original basis. So this goal is suitable for the development level of children in this class.

2. In the activity, the teacher throws questions at the children and guides them to observe, think and express. By asking correct questions, children can quickly find out the arrangement rules of each necklace, and when it comes to the arrangement rules of the third and fourth necklaces, 80% of children can combine these two characteristics.

3. In the process of operation, most children can take the initiative to find good friends to share information after getting the information. Three shy children also found a partner to share information with the help of the teacher. Children have different levels of string rules, some drink the same rules as the teacher's demonstration, some boldly innovate many rules, and some children even have 9 items as a group, which is especially good! However, some children can't see the patterns of the strung necklaces. Both children are extroverted and have strong communication skills. They found six partners to share the material, so there are too many kinds of material. When they saw these materials, they couldn't wait to string them together, so they didn't string them according to the rules. There are 1 child's abilities between three and four as a set of rules, but they share too much material, which leads to the string not being arranged according to the rules.

4. This activity is a little long, about 35 minutes, but the whole activity atmosphere is particularly harmonious and the children are very happy! After the activity, the children are still immersed in the joy of sharing and are unwilling to go out of the activity room.

Little Hedgehog's Necklace Middle School Mathematics Teaching Plan 2 Activity Goal:

1. Use the situations in picture books to help children master the experience of indirect sorting.

2. Encourage children to boldly try to make their own rules and sort them according to the rules.

Let children realize that it is a happy thing to help others.

4. Cultivate children's spirit of trying and develop children's agility and logic of thinking.

5, stimulate children's interest in learning, experience the happiness of mathematics activities, and feel the fun of collective activities.

Activity preparation:

1, little hedgehog's necklace PPT

2, colored beads, rope.

Activity flow:

Firstly, introduce stories and learn the rules of indirect sorting. The teacher said: children, the teacher brought you a nice story today. A cute little animal is covered with thorns. Who do you think it is? (Hedgehog) (Showing pictures) This little hedgehog has a nice name, laya. Raya is always alone, because she is covered with thorns, so she often shrinks tightly together, and small animals run away when they see it! Every day. Laya plays alone and eats alone. One day, laya the Hedgehog picked many peas from the yard.

1, Question: Look, children, what's the difference between these beans? (color, size)

Raya watched these little beans have a brainwave and thought of a good idea! Question: Guess what it will do with these beans? (Children tell)

3. Listen to the story: Let's listen to what the hedgehog has turned peas into. The teacher told me that laya picked up the beans, put them on, put them on and made a necklace. Do you think Raya's necklace is beautiful? Can you tell the secret of Raya necklace? What do you think is the beauty of the necklace?

(Children discover the law of red and green) One is red and the other is green. It turns out that this necklace is red and green. Arrange according to this rule.

The next day, Laya went out wearing this beautiful necklace. How will the small animals in the forest react when they see Raya's necklace? (Show the picture) Look, what's the expression of the little animal? . Why not avoid it this time? The teacher tells a story: (When the small animals see Leia's necklace, they all think Leia's necklace is really beautiful. They also want to have such a necklace! Laya was glad to see that the little animals were no longer afraid of him, and wanted to make a necklace with him. So Raya said, "Come on, I'll take you to pick up beans. They can be made into beautiful necklaces! " "Raya took the animals to pick up beans in the Woods and made necklaces when she came back. )

Second, try boldly.

1, the small animals have picked up a lot of beans and are ready to show their talents. They have already started. Look, the rabbit is the first to make a necklace. Let's go and see how the rabbit's necklace is put on. (Picture) (Children discover the law of red, yellow, green and yellow) There is a color secret in the necklace. Let's talk about this secret: a red, a yellow, a green, a red, a yellow and a green. ...

2. Transition: The rabbit's necklace is on, so beautiful! But the little monkey next to him was in a hurry. Let's see what trouble the little monkey is in. (Show pictures) (Guide children to observe incomplete necklaces and say the rules)

The teacher also prepared some red, yellow and green peas to wear necklaces for the children. Can you put a necklace on the little monkey according to the law?

Summary: The children are really good. Let's show them to the teacher, shall we? Really, every child's necklace is the same as his own! Little monkey is so happy. He thanked you.

The duckling on the side was anxious and clamored for a beautiful necklace. Would you like to help?

Third, children's operation

1, children, first of all, I want to see what rules you are going to use to help ducklings make necklaces. Are there any different emission regulations for children?

2, children's operation, teacher tour guidance. Fourth, emotional sublimation, experience the happiness of mutual assistance. With everyone's help, the duckling has a beautiful necklace. You helped him. Are you happy? Happiness? Let's feel happy together. (Play happy clapping songs, music, magic and math story house: Little Hedgehog's necklace (sequential logic reasoning) One day, laya, a little hedgehog, discovered that red beans and mung beans can be strung together to make a beautiful necklace. He took other small animals and picked up a lot of red beans, mung beans and soybeans. Everyone arranges them in different ways and strings them into beautiful necklaces. When the elephant sees it, he wants a ... children, let's see what kind of necklaces Raya and her friends have made for the elephant with "sorting".

Teaching reflection:

The Little Hedgehog's Necklace is a lesson for children to try to express themselves in words and find that the order is different. The language expression ability of the middle class has a certain foundation with the growth and exercise of age. Under the guidance of the teacher's story, children can quickly find out the different arrangement order of necklaces, arrange them according to their own color rules, and express them accurately in their own language. Learned a simple rule sorting method.

Little Hedgehog's Necklace Middle School Mathematics Teaching Plan 3 Activity Goal:

1. I like reading picture books, and I understand the contents of picture books in appreciation and telling.

2. Learn simple and regular sorting methods and master the arrangement rules of AB and ABB.

3. Knowing and feeling sharing is a happy thing.

4. Actively participate in mathematics activities and experience the fun in mathematics activities.

Understand the application of numbers in daily life and the relationship between numbers and people's lives.

Activity preparation:

1.PPT The Little Hedgehog's Necklace.

2. Sorting operation should be completed by an operator.

3. A set of colorful bead pictures.

Activity flow:

(1) Play PPT and show the cover picture.

Teacher: Today, the teacher brought you a story. Before listening to the story, let's get to know the hero in the story. He is a small animal covered with thorns. who is it?

1. Show the cover picture of the hedgehog.

Teacher: He is the hero in our story today. His name is Leia.

2. Guide children to greet "laya".

(2) Appreciate the story of picture books and show the corresponding PPT pictures according to the story.

Teacher: Leia the Hedgehog lives in a beautiful forest. He is a lively and kind little hedgehog and likes to make friends. The big one, take the exam. Kindergarten teacher, out of the net, out of the net! However, one thing always bothers him, because the small animals in the forest are always afraid of being stabbed by his thorns, so they often stay away from him. Raya the Hedgehog can only go to the orchard alone to pick fruit every day; Have dinner quietly at home alone. Raya's life is so lonely because she has no friends. However, one day laya went to the orchard and found many adzuki beans.

(3) Teachers ask questions about the content of picture books. Lead out the sorted content.

Ask questions:

1. Show the picture on page five. Look, what do these beans look like? What's the difference between these beans? Let the children observe the beans and guide them to tell the' difference' of colors. ) Hedgehog has a good idea: Yes, I can wear these red beans and mung beans into a beautiful necklace.

2. Show the pictures on page six. Let's look at Raya the Hedgehog's necklace. Do you think it's beautiful? Where is the beauty? Can you tell us this beautiful secret (guide the children to tell them that the beautiful secrets hidden in the necklace are arranged in the order of "green, red, green and red")

4. Show the pictures on page five. Who can find out what secrets are hidden in the rabbit's necklace? (Guide children to look at the pictures and say the order of colors and sizes, red, green, green, red, green and green)

5. Help the little monkey to finish the unfinished necklace with the children. (red, green, green, red, green, green)

(4) When children operate the "small animal's unfinished necklace", the teacher asks for the necklace and gives tour guidance.

Teacher: Small animals in the forest also want to wear beautiful necklaces. Some small animals strung a few beans to make necklaces, while others haven't strung them yet. Please help them string them into beautiful necklaces. There may be secrets in the necklace.

(5) Take part in the forest dance, and the activity is over.

Teacher: Animals are wearing beautiful necklaces. They are so happy. Would you like to invite us to the forest dance?

Teacher: It's getting dark. Let's go home!

Teaching reflection:

The Little Hedgehog's Necklace is a lesson for children to try to express themselves in words and find that the order is different. The language expression ability of the middle class has a certain foundation with the growth and exercise of age. Under the guidance of the teacher's story, children can quickly find out the different arrangement order of necklaces, arrange them according to their own color rules, and express them accurately in their own language. Learned a simple rule sorting method.

Little Hedgehog's Necklace Middle School Mathematics Teaching Plan 4 Activity Goal:

1. Use the situations in picture books to help children master the experience of indirect sorting.

2. Encourage children to boldly try to make their own rules and sort them according to the rules.

Let children realize that it is a happy thing to help others.

4. Cultivate children's habit of speaking while operating.

5. Actively participate in mathematics activities and experience the fun in mathematics activities.

Activity preparation:

1, The Little Hedgehog's Necklace PPT2, colored beads, rope.

Activity flow:

Firstly, introduce stories and learn the rules of indirect sorting. The teacher said: children, the teacher brought you a nice story today. A cute little animal is covered with thorns. Who do you think it is? The big one, take the exam. Kindergarten teacher, out of the net, out of the net! (Hedgehog) (Showing pictures) This little hedgehog has a nice name, laya. Raya is always alone, because she is covered with thorns, so she often shrinks tightly together, and small animals run away when they see it! Every day. Laya plays alone and eats alone. One day, laya the Hedgehog picked many peas from the yard.

1, Question: Look, children, what's the difference between these beans? (color, size)

Raya watched these little beans have a brainwave and thought of a good idea! Question: Guess what it will do with these beans? (Children tell) 3. Listen to the story: Let's listen to what the hedgehog has turned peas into. The teacher told me that laya picked up the beans, put them on, put them on and made a necklace. Do you think Raya's necklace is beautiful? Can you tell the secret of Raya necklace? What do you think is the beauty of the necklace?

(Children discover the law of red and green) One is red and the other is green. It turns out that this necklace is red and green. Arrange according to this rule.

The next day, Laya went out wearing this beautiful necklace. How will the small animals in the forest react when they see Raya's necklace? (Show the picture) Look, what's the expression of the little animal? Why not avoid it this time? The teacher tells a story: (When the small animals see Leia's necklace, they all think Leia's necklace is really beautiful. They also want to have such a necklace! Laya was glad to see that the little animals were no longer afraid of him, and wanted to make a necklace with him. So Raya said, "Come on, I'll take you to pick up beans. They can be made into beautiful necklaces! " "Raya took the animals to pick up beans in the Woods and made necklaces when she came back. ) 2. Try boldly 1. Small animals have picked up a lot of beans and are ready to show their talents. They have already started. Look, the rabbit is the first to make a necklace. Let's go and see how the rabbit's necklace is put on. (Picture) (Children discover the law of red, yellow, green and yellow) There is a color secret in the necklace. Let's talk about this secret together: a red, a yellow, a green, a red, a yellow, a green ... 2. Transition: the rabbit's necklace is on, so beautiful! But the little monkey next to him was in a hurry. Let's see what trouble the little monkey is in. (Show pictures) (Guide children to observe incomplete necklaces and tell the rules) 3. The teacher also prepared some red, yellow and green peas for the children to string necklaces. Can you help the little monkey put on the necklace according to the rules?

Summary: The children are really good. Let's show them to the teacher, shall we? Really, every child's necklace is the same as his own! Little monkey is so happy. He thanked you.

The duckling on the side was anxious and clamored for a beautiful necklace. Would you like to help? Third, children operate 1, children, first of all, want to see, what rules are you going to use to help ducklings make necklaces? Are there any different emission regulations for children? 2, children's operation, teacher tour guidance. Fourth, emotional sublimation, experience the happiness of mutual assistance. With everyone's help, the duckling has a beautiful necklace. You helped him. Are you happy? Happiness? Let's feel happy together. (Play happy clapping songs, music, magic and math story house: Little Hedgehog's necklace (sequential logic reasoning) One day, laya, a little hedgehog, discovered that red beans and mung beans can be strung together to make a beautiful necklace. He took other small animals and picked up a lot of red beans, mung beans and soybeans. Everyone arranges them in different ways and strings them into beautiful necklaces. When the elephant sees it, he wants a ... children, let's see what kind of necklaces Raya and her friends have made for the elephant with "sorting".

Activity reflection:

This activity skillfully combines picture books with mathematics, and children's interest in learning is particularly strong, and the ability to share and cooperate is naturally integrated into it, giving people a wonderful feeling. This is the best math activity I have organized so far.

Little Hedgehog's Necklace Middle School Mathematics Teaching Plan 5 Activity Goal:

1, understand the story content of picture books in appreciation and telling, and consolidate the experience of interval sorting.

2. Learn to sort by rules and boldly try to make your own rules.

3. Knowing and feeling that helping others is a happy thing.

Activity preparation:

1, preparation of materials: materials for making necklaces, PPT for picture books,

2, children's experience preparation: regularly organize experience: know the concept of words such as loneliness.

Activity flow:

First, understand the story content of picture books and consolidate the interval sorting.

1, riddle introduction, leads to the story hero.

2. Play PPT in segments

Courseware 1: Teaching: Recently, Raya the Hedgehog encountered an annoyance. Hedgehog cried. Why is hedgehog so sad? Hedgehogs have no friends. Autumn is coming. The hedgehog goes out to pick beans. When he sees the duckling, he wants to say hello to it. How did the duckling escape?

Courseware 2: Teaching: Little Hedgehog went to his friend again, saw little rabbit and little monkey, and wanted to say hello to them. The little rabbit and the little monkey also escaped, and the little animals were afraid that the little hedgehog had thorns.

Courseware 3: Teaching: In the evening, Little Hedgehog has no friends and eats dinner alone. There is no smell at all. Today's dinner is red beans and mung beans. Hedgehog suddenly found that small beans can be turned into beautiful necklaces.

Courseware 4: Teaching: How many colors does this necklace consist of? (Red and green) How are these beans arranged? A red bean and a mung bean.

Courseware 5: Teaching: The next day, Little Hedgehog is going out. Look, the little hedgehog is walking with his head held high. It's today (showing the necklace around his neck). Does the little animal see that the little hedgehog likes the little hedgehog's necklace? Why do you like it?

Courseware six. Teaching: Little Hedgehog gave his beans to his good friend. What color beans do these good friends have (red, green and yellow)? What else did they find (in different sizes)?

Courseware seven. Teaching: Small animals put on small beans given by hedgehogs, and then make beautiful necklaces by themselves to see what rabbits' necklaces are like and how beans are classified.

Courseware 8. Teaching: However, the little monkey has some difficulties. He doesn't seem to know what to do with the next beans. Look, a big hello. Let's help this monkey.

Courseware 9. Teaching: Small animals such as pigs and kittens nearby all saw this beautiful necklace. The hedgehog gave them beans, but these little animals had beans, but they didn't turn them into beautiful necklaces. Can our children help them?

Second, show the operating materials.

Children operate, teachers tour to guide (let's help these little animals put on the same necklaces as little monkeys and rabbits, if you have a better idea, you can do it)

Third, the exhibition of children's works.

1. Show works. 2. Children can speak the law completely. (Red, yellow and blue-big and small)

Fourth, teachers show a regular order, and new regular patterns appear.

Red, yellow and blue (ABC cabbc:aabc aabc:bbac bbac; BBAC; baacbaac:……)

Look, the teacher also made necklaces for small animals. Look, are there many styles? Have you found any regularity in each necklace?

Five, children's free sorting

Children use their brains and think about what you would do if you made necklaces for small animals. Remember to be regular ~

VI. Exhibition of Children's Works

1, exhibition works

2. Children can tell what is the regular pattern of their works.

Seven, extended songs: everyone's game is really happy 33

Summary: The little hedgehog's necklace is a lesson that children try to express in words and find that the arrangement order is different. The language expression ability of the middle class has a certain foundation with the growth and exercise of age. Under the guidance of the teacher's story, children can quickly find out the difference in the arrangement order of necklaces, arrange them according to their own color rules, and express them accurately in their own language.

Little Hedgehog's Necklace Middle School Mathematics Teaching Plan 6 Activity Goal:

1. Learn the story and try to help small animals string necklaces with abb and aab models.

I like listening to stories and feeling the pleasure of helping small animals.

Activity preparation:

Self-made courseware "Little Hedgehog's Necklace", some pictures of small animals, sunflowers, lotus flowers, morning glory, carrots; One of the materials for children to wear necklaces.

Activity flow:

First, the story is imported.

Question: The teacher brought a nice story today. Who is this? What happened to the hedgehog? Why is he sad?

Summary: It turns out that small animals don't like hedgehogs. He has no friends and is very lonely.

Second, the little hedgehog's necklace

Question 1: The little hedgehog's necklace is really beautiful. What do you think is beauty?

Question 2: What does the little hedgehog wearing a necklace feel like? Guess, will he have any friends?

Question 3: The necklaces of the bunny and the duckling are also beautiful. What do you think is beauty?

Question 4: Look, what are the hedgehog and his good friend doing? Who picked the most mushrooms?

Question 5: What is the hedgehog doing?

Third, help elephants string necklaces.

The elephant wants a necklace.

Question: Think about it. How will they help elephants? What did they collect?

2. The little monkey and the hedgehog help the elephant string a necklace.

(1) Little monkey necklace

Question: What's the secret of its necklace? He hasn't finished wearing it. Who will be his good friend to help him?

(2) The necklace of hedgehog string

Question: Look at what materials the hedgehog has prepared.

Children help elephants string necklaces.

(1) Necklace requirements:

(2) Children help elephants string necklaces.

Four, the elephant's necklace

1, beautiful necklace

Question 1: Are these necklaces nice? Who will tell me about your necklace? How do you wind it?

Question 2: Are these necklaces nice? Who will tell me about your necklace? How do you wind it?

2, the elephant's mood

Question: Guess what the elephant will feel after receiving so many unusual necklaces?

Summary: Since Little Hedgehog got a beautiful necklace, he has become brave and confident, and has more and more friends. Moreover, the little hedgehog brought this happiness to his good friend, and he was never lonely again.

Little Hedgehog's Necklace Middle School Mathematics Teaching Plan 7 I. Activity Objectives:

1, children listen to the story carefully and understand the story.

2, children learn simple sorting rules, encourage children to boldly try to make their own rules, and sort according to the rules.

Let children realize that it is a happy thing to help others.

Second, the activity preparation:

1, circular stickers, animal pictures

2. Audio-visual teaching equipment: computers and courseware.

Third, the activity process:

(1) story import, learning indirect sorting method.

The teacher said: children, today the teacher invited a lovely little animal. He is covered with thorns. Who do you think it is? (Hedgehog) (as shown in figure 1) This little hedgehog has a nice name called Raya. Raya is always alone, because she is covered with thorns, so she often shrinks tightly together, and small animals run away when they see it! Every day. Laya plays alone and eats alone. One day, laya the Hedgehog picked many peas from the yard.

1, Question: Look, children, what's the difference between these beans? (color, size)

Raya watched these little beans have a brainwave and thought of a good idea! Question: Guess what it will do with these beans? (Children tell)

3. Listen to the story: Let's listen to what the hedgehog has turned peas into. The teacher told me that laya picked up the beans, put them on, put them on and made a necklace. Do you think Raya's necklace is beautiful? Can you tell the secret of Raya necklace? What do you think is the beauty of the necklace?

The next day, Laya went out wearing this beautiful necklace. How will the small animals in the forest react when they see Raya's necklace? Look, what's the expression of the little animal? Why not avoid it this time? (Children tell)

(2) Make a bold attempt

1, the small animals have picked up a lot of beans and are ready to show their talents. They have already started. Look, the rabbit is the first to make a necklace. Let's go and see how the rabbit's necklace is put on. (Figure 3)

(Children discover the law of red, yellow and green) There is a color secret in the necklace. Let's talk about this secret: a red, a yellow, a green, a red, a yellow and a green. ...

2. Transition: The rabbit's necklace is on, so beautiful! But the little monkey next to him was in a hurry. Let's see what trouble the little monkey is in. (Show Picture 4)

Guide the children to observe the incomplete necklace and say the rules. )

The teacher also prepared some red, yellow and green peas for the children to wear necklaces. Can you help the little monkey wear a necklace according to the rules?

Summary: The children are really good. Let's show them to the teacher, shall we? Really, every child's necklace is the same as his own! Little monkey is so happy. He thanked you.

Third, children's operation

1, children, first of all, I want to see what rules you are going to use to help small animals make necklaces. Are there any different emission regulations for children?

2, children's operation, teacher tour guidance.

Ask a child to talk about his own emission law first and show it on the blackboard, then talk about different laws. )

Fourth, emotional sublimation, experience the happiness of mutual assistance.

With everyone's help, the duckling has a beautiful necklace. Are you glad that you helped him? Happiness? Let's feel happy together (play happy clapping music)

Verb (abbreviation of verb) s reflection on activities;

This activity, combined with a good story, allows children to learn simple and regular sorting. The children listened carefully and showed great interest. They can raise their hands to answer the teacher's questions in class, or they can imagine the scene. In the process of telling a story, I can vividly express the artistic conception of the story, which is an improvement. However, because the activity involves mathematics, my language expression is not accurate enough, and I have not mastered the concept and elements of "law". So there are still some children who can't understand it during the operation. Moreover, I didn't demonstrate the operation, and I didn't explain the operation rules clearly, which finally led to the disorder of children's activities.