Mathematical sorting is an old textbook, but how to interpret the old textbook with a scientific view of children and education is a problem I think about. Middle school students' thinking is in the embryonic stage when concrete images are gradually transformed into abstract thinking. Although they have a superficial understanding of explicit sorting such as the size of numbers, the thickness and length of items, they don't know more abstract and regular interval sorting. So, I started an interesting story with "Bear's Birthday" as the background, and infiltrated it with regular sorting. Turn abstract and boring mathematics content into interesting game activities that children can explore independently; Let children fully enjoy and experience the fun that the situation brings to learning, playing games and using mathematics. In addition, children's operation of Pad in activities embodies the advantages of strong autonomy, convenience, easy inspection and easy error correction. At the same time, the interactive application of dual-screen technology and the situational infection of electronic picture books have also made old textbooks glow with infinite vitality.
Second, say the activity goal:
Based on the above analysis, I set the following three goals:
1. Cognition: Understand what is rule interval ordering in game situations, and there are various perceptual rule ordering. (key)
2. Ability: Explore the regular sequencing of twos and threes in actual operation. (difficulty)
3. Emotion: I am interested in math games, have good operating habits and a sense of teamwork.
Third, say activity preparation:
In order to achieve the goal better, I made two preparations:
1, experience preparation: children have a certain understanding of simple item sorting and numerical sorting; Have some experience in PAD operation.
2, material preparation: one PAD (divided into teacher version (situational interface and operation interface) and children's version (operation interface), dual-screen display (screen 1: push the teacher's pad or children's pad screen; Screen 2: Keep the children's operation results and make cards regularly) Today, in order to facilitate the lecture, I put the teacher's pad courseware, the children's PAD courseware and the screen 2 courseware together in a PAD, and each group has two pictures of the house.
Fourth, teaching methods and learning methods:
The teaching methods used in the activity are: multimedia operation, interactive learning, independent inquiry,
(1) Game situational method: It is lively and interesting to integrate the step-by-step knowledge into four situations: preparing a bear gift, laying a beautiful path, making a delicious cake and sharing a happy birthday.
(2)pad demonstration and operation method: Teacher pad demonstrated vivid game situations, making it convenient to use graffiti function when analyzing operation results. Children's PAD operation is conducive to children's repeated verification, display, error correction and summary.
Five, said the activity process:
In this activity, I designed four links in combination with the situation:
The first link: prepare the bear gift.
1. Take "birthday" as the situation to introduce the activities.
(1) (Play the courseware): Little Bear is going to celebrate his birthday and sent us an invitation. What should I prepare to celebrate my birthday? Draw out the consciousness of preparing gifts. (Teacher's Ipad shows) There are "dark chocolate" and "white chocolate" on the table. Let the children observe, analyze and try to put the corresponding chocolates according to the numbers and colors on the box.
(2) children's operation, the teacher asked children to talk about operational precautions, independently construct operational requirements, and patrol guidance. (children's software simulation operation). It is suggested that children after operation communicate with each other for examination.
(The above links not only transfer the points of children within 10, but also match and classify the color codes. It is a necessary warm-up training in children's mathematics activities. )
(2) Laying a beautiful path.
1. Lead to the task of paving the road on the grounds of "looking at the map".
(1) The plot continues (switch to the teacher's version): The gift is ready, but it can't be done without the way to the bear's house. (the teacher's iPad shows) leads to the task of paving the road.
(2) Know the materials with children and explore the paving method (the teacher's ipad shows): Ask the children to see what materials are available? What kind of beautiful paths can two colors of stones pave? Where do you think is the best place to start paving the road? (Start with a small flag and spread it from left to right, with a clear direction, paving the way for the construction of the law. Paving a beautiful path with black stone and white stone means that colors need to be matched, so that children can feel the beauty of color matching in the initial stage, and gradually perceive the law and discover the law in repeated operations. Simple demonstration
(3) After the operation, show and communicate for the first time: the path is so beautiful that the original black and white stones hide secrets in paving the road. Who discovered the secret? You can let the children communicate regularly, or you can abdicate, and let the owner of the work communicate the paving process.
(4) The teacher helps to improve: It turns out that two stones hold hands like good friends and appear repeatedly. "White and Black" are good friends. We can say that they are a group. The repeated appearance of groups has become a beautiful and regular path. (children's iPad display screen) Children's iPad display screen spacing line). The play mode is adopted in the exhibition, and the random painting demonstration helps the children to sort out the regular arrangement and refine the concept of "group by group". It will not affect children's correction and re-operation, which is very helpful for the presentation of the law.
(5) After the analysis, make a rule card on the spot by using the double screen and the second screen: (PPT display) Help children classify and summarize the styles discharged in their minds. Then let other children introduce different arrangements, exchange differences and consolidate the concepts of "one group" and "cycle". Summarize the rules and continue to make the rule card in screen 2.
(6) Next, let the children check the path by themselves: the children who made mistakes will be corrected, and the successful children will have the opportunity to re-pave the road, and the requirements will be different from those just discharged from the hospital to form a second regular path. This is also the operational advantage that electronic media gives children personality.
(7) After the homework, communicate and share in the group: preset: if there is a regular laying method for children's three stones, it will be affirmed and summarized: (originally, "a group of good friends" can be two good friends with different colors or three good friends with different colors holding hands), paving the way for the third link to focus on three groups of sorting, and the teaching focus is on the basic breakthrough of two homework and display. Show the rule card 2 with double screen 2: (PPT display) I found with the children that I made the rule card in advance in order to see the preset operation results conveniently today.
(8) (Switch to Teacher Edition) Let's go when the children have paved their own way! Ask the children Qi Xin to join hands to connect the paths in the PAD, and follow the music to the bear's house.
(3) making delicious cakes.
1. Take "making a cake" as an event, which leads to the decoration task.
(1) The plot continues: Come to Bear's house, and Bear is making a cake! The cream has been smeared, and we will decorate the cake with the chocolate bear we brought! Bear prepared a secret card for us, which led to the task of decorating the cake. (Teacher iPad opens the envelope)
(2) freely exchange the secrets of "secret cards" and cake circles with children. Please 1 children try to line up. Teachers focus on refining "three groups" and "one group after another" languages. Emphasize the decoration requirements of "decoration in one direction is definitely more beautiful". (Teacher PAD simulation operation)
(3) Then, the children are free to choose secret cards and start decorating cakes. On the secret card, there are some black, two white and three chocolates, and some white, two black and three chocolates to guide the children to explore the order of the three groups. This is also the difficulty of the activity. The presentation of secret cards helps children to gradually construct a sorting method: first, determine the rules, and then arrange them in the same direction, which lays the foundation for exploring more difficult sorting.
(4) Then, show the works of different children: analyze whether the cake circle is regular with the children. Focus on whether the rule "group" matches the secret card, and pay attention to whether the rule extends in the right direction. (children's iPad display screen) Children's iPad display screen spacing line). The play mode is still used in the exhibition, which helps children to have a clear direction and regular arrangement. According to the results of children's operation, the second screen still made three sets of rule cards, and the changes of rules were more abundant. (PPT presentation) Look at the rule card summary: I found that the same three chocolates can discharge several different rules.
(5) Then, give children time and space to correct their own mistakes and check and correct them in groups. The teacher helps the weak children in time.
(6) Further explore multiple sets of laws: Bear still has some cake rings that need our help. We tried to divide them into groups of two or three. How many people do you want to form a formal "group"? Meet the demand and conduct the second operation. (This link is mainly an extended link. Through the previous study, the children have had some experience in sorting the two groups and the three groups. Here, they are given the space to continue exploring. Those with weak ability can continue to explore three groups. Strong ability can take a step forward and guide children to discover that the more chocolate a group has, the more regular it can be discharged. Do a good job in the investigation of teachers' future study during the guidance or secondary teaching in this area. )
(4) share a happy birthday. Qi Xin, children, we need to relax when we finish a task together.
1, (switch to the teacher's version) The teacher becomes a magician! Let's stack each group of children's cake rings! Wow, it turned into a big cake. (Teacher iPad operation)
2. Music begins, sing together: Happy birthday to you. Using multimedia, dramatic changes and music to render the activity to the end, the plot also got a perfect ending, the atmosphere of the activity reached a climax, and the children ended the whole activity with joy.
Sixth, talk about the benefits of "multimedia introduction" to teaching activities;
1, the attempt of electronic picture books: making story situations into electronic picture books. The intuitive picture is more vivid and vivid than the teacher's description, which greatly increases children's interest and attention in participating in activities. There is zero pressure in the whole process, and some are just the motivation to constantly challenge. They perceive, understand and create their own laws in the interaction with electronic picture books, which constructs the premise for the breakthrough of difficulties.
2. The attempt of Pad operation: the use of pad is the highlight of the whole activity and an important means for children to learn. If you use physics teaching AIDS in activities, you need to prepare a lot of things and you can't reuse them after learning. Moreover, paper teaching AIDS and physical teaching AIDS are not conducive to children's error correction, display and so on. PAD is easy to operate, which is beneficial for children to repeatedly operate, show, verify, correct and summarize. It played a key role in the breakthrough of difficulties.
3. The attempt of double-screen display: When considering the improvement and summary of regular experience in design activities, it is necessary to keep the children's thinking achievements. Therefore, a dual-screen display is adopted. The screen is used to display the teaching situation, operation, etc. The other screen displays and retains the summary content (rule card), which helps children classify and summarize the styles discharged from their minds and plays a solid role in breaking through difficulties.