1, review the counting method of pomegranate receptacle in closed arrangement.

2. Try to record the classification results by statistical methods, and be willing to introduce your own calculation results in concise language.

Activities to be prepared

Preliminary contact with closed numbers: sorting box, statistical table and pen; Pomegranate flower trays picked up by children, one for each group. "Pomegranate grows up quickly" operation diagram: pomegranate flower receptacle-small pomegranate-green pomegranate-mature pomegranate in turn.

Activity process

1, review the counting method of closed arrangement.

(1) Count the petals of pomegranate flower Tori.

Teacher: Please ask each child to take a pomegranate receptacle from the plate and carefully count how many petals it has. How did you figure it out?

Summary: When counting petals, we should first determine a starting point, which can be marked, and then count petals one by one, so that we can know where the end point is. There will be no omissions and repetitions.

(2) Check each other and re-determine the number of petals of pomegranate receptacle.

Summary: The number of pomegranate petals is different.

2. According to the number of petals of receptacle.

(1) Use the classic dialogue of the story "Three Butterflies" to illustrate the operation requirements. For example, "Room 4 said,' Please come in with four pomegranate flowers. Other quantities do not come in. ""No.5 Hospital said,' Please bring five pomegranate petals, and nothing else. " "'

Category box:

(2) Children's operation: Send five pomegranate flowers to the corresponding digital sorting boxes according to the number of petals in the receptacle.

(3) Show the children to each other, introduce their classification results, and talk about how many pomegranate flower trays were invited in Room 4, Room 5, Room 6 and Room 7 respectively.

3. Try to use statistical methods to record the classification results.

(1) Teachers and children discuss ways to establish recording.

Show me the statistics: let the children carefully observe what they see on the recording paper. Guess what they mean respectively?

(2) Children's operation, using dot symbols to record the number of pomegranate receptacles with different petals in the sorting box.

Teachers' itinerant guidance: pay attention to the methods and steps recorded by each child and understand the children's problem-solving strategies.

(3) Guide the children who finished first to observe their own recording paper and find out the most pomegranate flower holders and the least pomegranate flower holders.

4. The game "Pomegranate grows up quickly".

(1) Teachers and children establish the rules of the game: tell the number of pomegranate receptacles with different petals with concise' words', and the pomegranate receptacles will grow up slowly after correct words. (According to the number of pomegranate flower receptacles recorded by children, children express it in complete language, such as 5 pomegranate flower receptacles with 1 each and 6 pomegranate flower receptacles with 3 ... After the children tell it correctly, demonstrate the growing process of pomegranate with painting teaching AIDS. )

(2) Communicate with each other and learn to express their calculation results in correct language.

(3) Play the game "Pomegranate grows fast", and children will tell it in turn, and show the process of pomegranate receptacle growing slowly through pulling.

Activity reflection

Educational content originates from life. After discovering children's interest in pomegranate receptacle, I kept digging and found the educational value implied by children's interest: the number of petals of pomegranate receptacle scattered all over the place is different. Therefore, I creatively designed an educational activity to classify and count pomegranate receptacle, which turned a common content in life into a meaningful teaching material. With the continuous solution of the problems, children's original interests continue to deepen and develop, resulting in new activities, and through statistical methods to solve some common practical problems in life. For example, toys, family members and even some common things in life are classified and counted with a purpose.

Pay attention to the guidance of the activity process. In order to avoid the children's laissez-faire and aimless operation behavior in the activity, I clearly stated the purpose, requirements and specific operation methods of the operation before the operation, and then the children can operate freely. If you use the classic dialogue of the story "Three Butterflies", you can effectively put forward the operation requirements; When trying to record the classification results by statistical methods. I encourage children to discover the secrets of recording paper and explore the methods of recording; When displaying and communicating the operation results, through the game situation of "Pomegranate will grow up soon", put forward the requirements of telling, and consciously remind children to express it in complete language. In this way, the operation phenomenon of formalism is put an end to.

There are also some shortcomings in this activity, and some links need to be further adjusted and improved. Mainly in the following aspects:

1. At the beginning, guide the children to count the petals of pomegranate receptacle. Because it is a closed state of counting, children have many different methods, but this part of the teacher ended too hastily and summarized too early, and the teacher changed the child's answer. In this link, children should explore various effective counting methods independently, paving the way for the classification of pomegranate receptacle.

2, when guiding children to try to record the classification results, although the teacher guides children to observe the record table independently. The method of recording is discussed, but the teacher lacks a good evaluation summary, which leads to some children's records being wrong.

3. The atmosphere in the activity is harmonious, and the interaction between teachers and students is good, but the interaction between students is insufficient, and more attention is paid to children's individual exploration. Reflection after the activity can guide children to cooperate in groups and classify some of them in the process of classifying pomegranate receptacle. Some do a good job of recording statistics, and some communicate with others, which can better cultivate children's cooperation ability and the ability to actively find and solve problems.

4. Teacher evaluation still lacks motivation and pertinence. In the face of children's answers, in addition to using "you are so smart" and "you are great". It can also be said that "who has different methods" and "the children have said in a complete way that there are 2 pomegranate receptacles and 5 petals". In the process of exploration, children feel that teachers attach great importance to their own views and opinions, which is also conducive to helping children better answer questions and refine the value of exploration.