MHC He Miao Qifu Station

Yueqing experimental primary school Chen Zhiyan mHC he Miao Zhu Xue Zhan

MHC He Miao Qifu Station

Classroom Record: mHC He Miao Blessing Station

MHC He Miao Qifu Station

First of all, introduce the new knowledge of mHC He Miao Blessing Station with realistic materials.

MHC He Miao Qifu Station

1. Tell me about the shapes of objects you see in your daily life. MHC He Miao Qifu Station

MHC He Miao Qifu Station

Teacher: Yesterday, we learned about cuboids, cubes, cylinders and spheres. Who can tell us which objects around you are of these shapes? MHC He Miao Qifu Station

MHC He Miao Qifu Station

Health: The blackboard is a cuboid. MHC He Miao Qifu Station

MHC He Miao Qifu Station

The speakers in the classroom are cuboids. MHC He Miao Qifu Station

MHC He Miao Qifu Station

(Students point to the cylindrical cup on the table in front of the classroom) This cup is cylindrical. MHC He Miao Qifu Station

MHC He Miao Qifu Station

My refrigerator is a cuboid. MHC He Miao Qifu Station

MHC He Miao Qifu Station

……mHC He Miao Blessing Station

MHC He Miao Qifu Station

(2) Let students find their favorite objects from various three-dimensional graphics on the desktop. MHC He Miao Qifu Station

MHC He Miao Qifu Station

Who will tell you what shape object you are holding? MHC He Miao Qifu Station

MHC He Miao Qifu Station

Health: I'm looking for the cylindrical mHC He Miao Blessing Station.

MHC He Miao Qifu Station

Student: ..... (The teacher sticks columns, cuboids and cubes on the blackboard in turn according to the students' answers) mHC rice seedling blessing station.

MHC He Miao Qifu Station

Health: I'm looking for a triangular prism (a student took out a triangular prism) mHC rice seedling blessing station.

MHC He Miao Qifu Station

Teacher: This is not called a triangle, but a "triangular prism". (Ask students to repeat their names) mHC He Miao Blessing Station

2. Touch the surface of the object and feel the surface. MHC He Miao Qifu Station

Teacher: These are objects that we know ourselves. Please touch the surface of these objects How do you feel? Tell your feelings to the children in the same group. MHC He Miao Qifu Station

Ask the students to touch the surface of the object and tell their feelings to the children in the same group. MHC He Miao Qifu Station

(Students touch the face of an object and exchange feelings with their classmates) mHC He Miao Blessing Station.

Teacher: Who will tell you how you feel? MHC He Miao Qifu Station

Health: I feel mediocre. MHC He Miao Qifu Station

MHC He Miao Qifu Station

Health: It feels slippery. MHC He Miao Qifu Station

MHC He Miao Qifu Station

Student: It feels a little sharp (the student touches the edge of the triangular prism). MHC He Miao Qifu Station

MHC He Miao Qifu Station

Teacher: Oh, you are not a face, you are the edge of a triangular prism. Anything else? MHC He Miao Qifu Station

MHC He Miao Qifu Station

Health: I feel a little slippery, and some feel a little inferior. MHC He Miao Qifu Station

MHC He Miao Qifu Station

Teacher: Is that mediocre? MHC He Miao Qifu Station

MHC He Miao Qifu Station

Health: Yes. MHC He Miao Qifu Station

MHC He Miao Qifu Station

(Comment: In fact, what I want to explain here is that "slippery" or "inferior" are all material problems, and then the surface is flat. ) mHC He Miao Blessing Station

MHC He Miao Qifu Station

Health: Some noodles feel very round. MHC He Miao Qifu Station

MHC He Miao Qifu Station

……mHC He Miao Blessing Station

MHC He Miao Qifu Station

(Comments: This link is designed not only to review and consolidate old knowledge, but also to pave the way for new knowledge and "warm up". Because the understanding of three-dimensional graphics is only the content of the last class, some students may not know enough about the characteristics of various three-dimensional graphics, so they are not very familiar with their shapes and names. Through this link, students can have an opportunity to review old knowledge and consolidate old knowledge. This link also builds a platform for the development of new knowledge, because students' operations such as touching, finding, speaking and drawing in the later links are based on this link. ) mHC He Miao Blessing Station

MHC He Miao Qifu Station

Second, feel the "face" from the "body" and get the mHC vaccine blessing station

1, know the rectangular mHC He Miao blessing station.

MHC He Miao Qifu Station

① Understanding rectangular mHC rice seedling blessing platform from cuboid.

MHC He Miao Qifu Station

Teacher: By touching, the children found that some faces of these objects were flat and some were round. But does anyone know what the face of a cuboid is? MHC He Miao Qifu Station

MHC He Miao Qifu Station

Health: Rectangular (about half of the students answered) mHC He Miao Blessing Station.

MHC He Miao Qifu Station

Teacher: Great, so many people know. Now we can find the rectangle from one face of the cuboid. MHC He Miao Qifu Station

MHC He Miao Qifu Station

(Take a rectangular piece of paper from one side of the cuboid and stick it next to the cuboid model on the blackboard. Write on the blackboard: rectangle and ask the students to read the word "rectangle") mHC He Miao Blessing Station.

② Find a rectangular mHC rice seedling praying platform on the cuboid.

MHC He Miao Qifu Station

Teacher: Now please find a cuboid from the desktop. Can you find a rectangle from the cuboid in your hand? MHC He Miao Qifu Station

MHC He Miao Qifu Station

Health: I found a piece of paper in the box and folded it into a rectangle. Because I provided some medicine packaging boxes, some of which contained instructions. ) mHC He Miao Blessing Station

MHC He Miao Qifu Station

Health: I found a rectangular (pointing and talking) mHC rice seedling blessing station on this cuboid.

MHC He Miao Qifu Station

……mHC He Miao Blessing Station

MHC He Miao Qifu Station

③ Touch the found rectangular mHC He Miao Blessing Desk.

MHC He Miao Qifu Station

2. Know other graphic mHC He Miao blessing station.

MHC He Miao Qifu Station

① Find mHC He Miao Blessing Station.

MHC He Miao Qifu Station

Teacher: Just now, everyone found a rectangle, so can you find other figures from other objects? MHC He Miao Qifu Station

Health: I found a circle on the cylinder. MHC He Miao Qifu Station

MHC He Miao Qifu Station

..... MHC He Miao Qifu Station

MHC He Miao Qifu Station

Health: I found a square on a cuboid. MHC He Miao Qifu Station

MHC He Miao Qifu Station

Teacher: Hey, find a square? Can you show the cuboid in your hand to other children? Oh, children, have a look. It turns out that this cuboid is a special cuboid with square ends. This little friend is great. He feels very good. Anything else? MHC He Miao Qifu Station

MHC He Miao Qifu Station

Health: I found a rectangle on the triangular prism. MHC He Miao Qifu Station

MHC He Miao Qifu Station

Teacher: (pretending to be strange) Is there a rectangle on the triangular prism? Where is it? MHC He Miao Qifu Station

MHC He Miao Qifu Station

Health: Yes, here it is. (Touching and chatting) mHC He Miao Blessing Station

MHC He Miao Qifu Station

Teacher: Great, even the rectangle on the triangular prism can be found. MHC He Miao Qifu Station

MHC He Miao Qifu Station

Teacher: Just now, everyone found a square from a cube. (Take a square piece of paper from one side of the cube, stick it next to the cube model on the blackboard, and write: square on the blackboard) Find the circle from the cylinder. (Take out a circular piece of paper from the bottom of the cylinder and stick it next to the cylinder model on the blackboard, and write: circle) Find the triangle from the triangular prism. (Take out a triangular piece of paper and stick it on the blackboard, and write: Triangle) mHC He Miao Blessing Station.

MHC He Miao Qifu Station

(Comments: The teaching method of "helping first and releasing later" is adopted in the above links. In the "help" part, because students have been exposed to rectangles, squares, triangles and circles in kindergarten, and they already know what they look like, I directly let students understand the relationship between "face" and "body" and "peel off" face from "body", which is intuitive and impressive. Then let the students find and touch the rectangle, mainly to let the students know more about the feeling of "plane". In the part of "release", two contents are arranged: "find" and "say". When "watching", students may find that there is a square on the cuboid and a rectangle on the triangular prism. In this way, under the guidance of the teacher, students can realize that there may be multiple faces on a three-dimensional figure instead of one face. This also achieved the purpose of "releasing". "Speaking" is mainly to train students' language integrity and logic, and lay a foundation for future mathematics learning. ) mHC He Miao Blessing Station

MHC He Miao Qifu Station

② Compare the difference between three-dimensional graphics and plane graphics, and reveal the theme of mHC He Miao Blessing Station.

MHC He Miao Qifu Station

Teacher: (pointing to the posted numbers) These are the numbers that the children found. Do you know them? Let's read the names of these figures together. (Students read) Let's compare the shapes we know today with the objects we know yesterday. MHC He Miao Qifu Station

MHC He Miao Qifu Station

Health: long and rectangular. MHC He Miao Qifu Station

MHC He Miao Qifu Station

Health: cylindrical and bulging, round and flat. MHC He Miao Qifu Station

MHC He Miao Qifu Station

Health: A cube has six faces, and a square has only one face. MHC He Miao Qifu Station

MHC He Miao Qifu Station

Health: MHC He Miao Clifford Station.

MHC He Miao Qifu Station

The teacher made a summary and unveiled the blackboard writing: Understanding Plane Graphics mHC He Miao Blessing Station.

MHC He Miao Qifu Station

Third, learn to use "body" to describe "shape" mHC rice seedling blessing station

MHC He Miao Qifu Station

1, draw various shapes of mHC rice seedling blessing stations.

MHC He Miao Qifu Station

Teacher: Please draw the pictures you learned today with the objects on the desktop. Children in the same group can also cooperate with each other. You can read page 34 if you can't draw. MHC He Miao Qifu Station

MHC He Miao Qifu Station

Student operation, teacher patrol guidance. MHC He Miao Qifu Station

2. Classification of 2.mHC He Miao Blessing Station

MHC He Miao Qifu Station

Teacher: Please choose two of the most beautiful figures from your own works and paste them on the blackboard. You have to figure out where to post it yourself. (In the process of pasting, some children paste circles behind triangles or rectangles behind squares. ) mHC He Miao Blessing Station

MHC He Miao Qifu Station

Let other students evaluate, did they post it correctly? (Students go to the blackboard to make corrections) mHC He Miao Blessing Station

MHC He Miao Qifu Station

(Comments: In this session, I want students to say that there are many ways to obtain plane graphics: you can draw along the edge of the three-dimensional graphics, you can cut one side of the three-dimensional graphics with scissors, and you can also print it out with inkpad. This design is mainly to reflect the diversity of methods and strategies to solve problems, and to cultivate students' sense of innovation and cooperation. Finally, let students paste their own plane graphics on the corresponding position on the blackboard, which is not only a further perception of the characteristics of plane graphics, but also a preliminary infiltration of classification knowledge. But in this link, I didn't prepare so many materials for students, such as scissors inkpad, and I didn't guide students to tell them many ways to get plane graphics. I just asked them to draw pictures to make the whole class lack of highlights. ) mHC He Miao Blessing Station

MHC He Miao Qifu Station

Fourth, deepen the understanding of plane graphics mHC He Miao Blessing Station

MHC He Miao Qifu Station

1, find mHC He Miao Blessing Station.

MHC He Miao Qifu Station

Teacher: Who can tell us where we have seen these plane figures around us? You can get up from your seat, look in the classroom, or talk about what you see at home and on the road. MHC He Miao Qifu Station

MHC He Miao Qifu Station

Teacher: Who will get up and tell everyone? MHC He Miao Qifu Station

MHC He Miao Qifu Station

Health: MHC He Miao Clifford Station.

MHC He Miao Qifu Station

(Comments: This can not only enrich students' perception of graphics, but also realize the ubiquity of rectangles, squares, triangles and circles in life. ) mHC He Miao Blessing Station

MHC He Miao Qifu Station

2. Fight for mHC He Miao Blessing Station.

MHC He Miao Qifu Station

Work in groups to design a beautiful map with rectangles, squares, triangles and circles. MHC He Miao Qifu Station

MHC He Miao Qifu Station

(Comments: Let students explore learning in practical activities, engage in "re-creation" learning activities, stimulate students' divergent thinking, and cultivate students' innovative spirit and practical ability. By organizing teaching in groups, we can give full play to students' collective wisdom, embody students' cooperation and mutual assistance, cultivate students' imagination and creativity, and develop students' spatial concept. ) mHC He Miao Blessing Station

MHC He Miao Qifu Station

Verb (abbreviation of verb) Summary of mHC He Miao Blessing Station in the whole class

MHC He Miao Qifu Station

What graphics did we learn in this lesson? MHC He Miao Qifu Station

MHC He Miao Qifu Station

Go home and find out which objects have the same face as the graphics you learned today. Will you tell your parents what you found? MHC He Miao Qifu Station

MHC He Miao Qifu Station

(Comment: The end of class does not mean the end of study. Here, the teacher left a space for students to communicate with their parents, which not only allowed students to further understand the characteristics of plane graphics in their lives, but also allowed parents to participate in their children's learning activities, killing two birds with one stone. ) mHC He Miao Blessing Station

MHC He Miao Qifu Station

MHC He Miao Qifu Station

MHC He Miao Qifu Station

Reflection and analysis after class: mHC He Miao Clifford Station

MHC He Miao Qifu Station

The textbook arranges the content of understanding plane graphics after understanding three-dimensional graphics, and introduces it into teaching through the relationship between three-dimensional graphics and plane graphics. Because in real life, most students are in direct contact with three-dimensional graphics and can see the surface of objects anytime and anywhere. In this way, according to students' existing life experience, through rich learning activities, help them intuitively understand common plane graphics. On the basis of intuitive understanding of cuboid, cube, cylinder and triangular prism, let students "separate" from objects by touching, searching and drawing, study the shape of curved surface, form the representation of rectangle, square, triangle and circle, and let students realize that "face" is on "body". This arrangement not only includes the relationship between face and body, so that students can intuitively understand these kinds of plane graphics as a whole, but also conforms to the cognitive law of junior children and is conducive to their active understanding of plane graphics. The textbook emphasizes mastering knowledge in activities, and some open activities designed by it can not only contain the knowledge that students need to master in activities, but also meet the needs of students with different characteristics. Through students' hands-on operation, it is helpful to cultivate students' spatial concept and problem-solving ability, develop mathematical thinking and naturally complete the learning process. Moreover, the theme selected in the textbook is in line with the age characteristics of children, vivid and interesting, which is conducive to cultivating students' interest in learning. MHC He Miao Qifu Station

MHC He Miao Qifu Station

1. Emphasize the close connection between mathematical knowledge and real life, and stimulate students' interest in mHC He Miao Blessing Station.

MHC He Miao Qifu Station

Through the problem situation of "Tell me where I have seen these plane graphics in my life", students are guided to review the three-dimensional graphics they have learned before and naturally transition to the understanding of plane graphics; Closer to the connection between mathematics and life, arouse students' original life experience, and make students feel that mathematics is useful and mathematics is around them. Students are always interested in the classroom. The whole math learning activity is so interesting that some students even forget to attend class and go directly to talk with other children. MHC He Miao Qifu Station

MHC He Miao Qifu Station

2, * * * * with the operation, independent thinking, learn to initially cooperate and exchange mHC vaccine blessing station.

MHC He Miao Qifu Station

This lesson is completed through a lot of hands-on operations. By using the learning activities of "touching", "seeing", "drawing" and "speaking", students not only pay attention to learning mathematics with their own inner experience, but also cultivate students' observation ability and awareness of using mathematics to communicate, and also enable students to initially perceive the surfaces of these objects (models) and gain perceptual knowledge and experience of the plan. At the same time, cultivate students' observation ability, hands-on operation ability, language expression ability and analysis, comparison and generalization ability, and develop students' spatial concept. In the process of drawing a picture, the students successfully completed the task through cooperative operation and achieved satisfactory results. And in the above-mentioned learning process, students have a preliminary perception of cooperation and communication, and know that group members should help each other and make concessions to each other. Because when the teacher asked them to find their favorite three-dimensional graphics, the children didn't complain because they didn't get their favorite objects, but also happily picked up other objects to communicate with the children in the same group. Some students discuss exchanging goods with other students. MHC He Miao Qifu Station

MHC He Miao Qifu Station

3. Tentative idea of preliminary infiltration classification mHC He Miao Blessing Station

MHC He Miao Qifu Station

After letting the students operate and get the plane graphics, I didn't put the students' works on the physical projection to show how they were drawn correctly, but directly asked the students to paste the graphics in the corresponding positions of various graphics on the blackboard. Several children posted in the wrong place, giving other children another chance to re-classify, which is a good thing. This arrangement not only shows students' works, but also allows students to classify various graphics, which initially permeates the idea of classification and paves the way for the next part of learning. MHC He Miao Qifu Station

MHC He Miao Qifu Station

This class also has many shortcomings. MHC He Miao Qifu Station

MHC He Miao Qifu Station

1. Students don't have enough perception of the negative side in the activity of "touching", and my guidance is not enough. For example, students say that some surfaces are a little rough and inferior, while others are slippery. I didn't point out in time that this was a matter of material texture, but directly led the topic to "Is the surface smooth?" In this way, the understanding of the word "flat" in plane graphics is a bit insufficient. MHC He Miao Qifu Station

MHC He Miao Qifu Station

2. Not prepared so many materials, scissors, inkpad, etc. For students to design "noodles" from the "body". There are also no methods to guide students to tell how to get a plane figure, such as printing with inkpad, cutting out a face of a three-dimensional figure with scissors, drawing along the edge of a three-dimensional figure with a pencil and so on. Most students draw directly with pencils along the facial contour of objects. This result does not reflect the diversity of methods and strategies to solve problems, and it is a discount to cultivate students' innovative consciousness. MHC He Miao Qifu Station

MHC He Miao Qifu Station

3. On the question of "Tell me where I have seen these plane figures in my life", I feel that although I have reached this point, it has not been expanded enough to guide students to search and give full play to the information in life. If it is well developed, it can not only enrich students' perception of graphics, but also better understand the existence of rectangles, squares, triangles and circles everywhere in life.