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Thinking about all kinds of lanterns in middle school mathematics after class
"Lantern Queue" This is a mathematical activity about sorting, and its goal is: 1. Learn to arrange items in order of size, shape and color. 2. Improve judgment and reasoning ability through observation and comparison. The key and difficult point is the target 1. I made full preparations according to the teaching content before class.

At the beginning of the activity, the scene was introduced, "The children have celebrated the Lantern Festival, and today the teacher will take you for a walk", so that the children can find an orderly arrangement in the background picture and attract their attention. They soon discovered that lanterns are a row of lanterns arranged in a complete arrangement according to a round lantern and a lantern.

In the second session, I showed a row of lanterns (ABB), one big and two small, and one red, one yellow and one green (ABC). These two rows of lanterns are incomplete and need to be filled completely. Under the guidance of the teacher, the children also quickly mastered their own order.

The last link is the arrangement of children's homework and the making of lanterns. According to the difference of children's ability, each group puts in different difficulty operation materials.

After class, I made a brief reflection on this activity. I think the whole activity went smoothly, the children mastered it well, and the goal was basically achieved. Children can easily acquire knowledge and skills by doing and playing. Dull math activities make the whole classroom atmosphere relaxed and interesting through situational teaching, and children's enthusiasm for participation is also high.

The whole activity is divided into three parts with clear levels. In the first part, children can observe and find that the graphic queue is regular. Through graphic comparison, guide children to perceive the basic characteristics of graphic queuing. This is the training of children's preliminary judgment and reasoning ability. In the second link, children can use heuristic and prompt methods to guide children to further master and summarize the arrangement characteristics of graphics on the basis of discovering laws. Let children feel the pleasure of sorting different colors and different graphics according to the law, and also exercise their observation and agility. During the activity, some operating materials with different difficulties were set up to meet the needs of different children.

When manipulating things, middle-class children have gradually realized the attributes of some things, such as size, length, color, shape and so on. They can understand the properties of different objects, find their obvious differences, and feel the experience of related laws. In the form of games, this activity guides children to learn, observe and compare by creating multi-directional dialogues of scenes, teaching AIDS and homework materials, so that their experience is more in-depth, standardized and organized, and children can further feel the beauty of mathematical laws.

After class, I will share, discuss and communicate with other teachers in the group to further improve myself.