The design idea of 1 the math teaching plan for large class children;
Children already have a lot of perceptual knowledge about plane graphics. Through the activities of folding, cutting and splicing, students can decompose and splice simple graphics, initially cultivate their hands-on operation ability, and develop their spatial concept and innovative consciousness.
In the activities, promote children's self-development, create the habit atmosphere of children's active learning and exploration, make children initially form the consciousness of conscious cooperation, cultivate children's observation, imagination and language expression ability, and give children sufficient time and space for thinking and expression. In the teaching process, activities such as folding, cutting, comparing, spelling and speaking are mainly adopted, so that students can learn knowledge in the activities of operation, exploration and observation and provide space for students to give full play to their imagination.
In the activity, we designed many hands-on activities based on children's perception. At the same time, pay attention to the combination of operation, thinking and inquiry, guide students to think in operation, and take operation as exploration knowledge; Taking operation as the carrier, it is a means to give full play to students' imagination.
Teaching purpose:
1, let students explore the methods of spelling and counting angles through the practical operation activities of "spelling, cutting and counting".
2, through the operation activities, enhance students' awareness of participation, cultivate operational ability and good operating habits.
3. Improve students' observation and analysis ability, initially cultivate students' thinking flexibility and develop their intelligence through operational activities.
Activity preparation:
Teaching AIDS: 10 double triangular disk, 5 triangles (arbitrary), 10 rectangular scissors and ruler.
Learning tools: one for triangle, square, trapezoid and rectangle, and one for scissors.
Activity flow:
First, review.
Know all kinds of graphics.
What are the following figures? Can you name them? (Square, rectangle, trapezoid, triangle)
Second, spell the corner
Teachers; "Today, let's play a plan, put two pictures together and see what graphics will become. What changes have been made? From several corners to several corners. Let's try it together. Please take your own photos, think about it and spell it out. " Child operations.
Summarize the calculation results: Teacher: "Did you just flatten those numbers with these numbers?" Children answer: (two squares make up a rectangle, two rectangles make up a square, two triangles make up a rectangle or square, a trapezoid and a triangle make up a rectangle, four triangles make up a square, and so on. ) Third, cut corners. Just now, the students used their intelligence to spell out so many graphics, which was really clever.
Third, cut corners.
Teacher: We already know that a rectangle has four corners. What happens if you cut one knife at a time? Let's listen to one: One day, Father Rabbit played happily with his three children. Mother rabbit took out three rectangular pieces of paper and distributed them to three children. Then she said, "today, mom will test you to see who can think." If you cut off one corner of a rectangle with a knife, how many corners are there? " Brother Grey Rabbit pursed his mouth, thought for a moment and said, "4- 1 = 3, there are three more." Sister White Rabbit picked up a rectangle, cut off a corner and said, "I think it should be five." Brother Black Rabbit also picked up a rectangle and folded it first, saying, "Mom, I think it's still four corners." As he spoke, he showed three rectangles and a gray rabbit brother, a white rabbit sister and a black rabbit brother 4- 1 = 3, 5, 4. Three rabbits immediately argued that their answer was correct. Teacher: Students, please take out a rectangular piece of paper, think about it first, fold it, cut it again, and finally help Mother Rabbit evaluate who is right in their answer. The children start to fold, cut and discuss, and the teacher will patrol and guide. Teachers and students discuss with each other, and children take the stage to demonstrate their own paper-cutting methods. After reading the student's conclusion, I think mother rabbit will smile and say to her three children, "Son, you don't have to fight." Your three answers are all right, but you should consider the problem comprehensively in the future. " Teacher: Now we know that if a rectangle is cut across the board, there may be three, four or five corners. If you drop a triangle across the board, how many angles are there? Please also give the students a discount before cutting. Teachers and students discuss, draw maps and perform.
Expanding activities: Just now, a rectangle was cut across the board and a corner was cut off. There are three situations. If two corners of a rectangle are cut off, how many corners are left in the graph? Because of the time, I will leave it to the students to discuss after class.
Mathematics teaching plan for children in large classes: the design idea of spelling and cutting corners 2;
Children already have a lot of perceptual knowledge about plane graphics. Through folding, cutting and splicing, children can decompose and splice simple graphics, thus initially cultivating children's hands-on operation ability and developing children's spatial concept and innovative consciousness.
In the activities, promote children's self-development, create the habit atmosphere of children's active learning and exploration, make children initially form the consciousness of conscious cooperation, cultivate children's observation, imagination and language expression ability, and give children sufficient time and space for thinking and expression. In the teaching process, activities such as overlapping, cutting, comparing, spelling and speaking are mainly adopted, so that children can learn knowledge in the activities of operation, exploration and observation, and provide space for children to give full play to their imagination.
In the activity, we designed many hands-on activities based on children's perception. At the same time, pay attention to the combination of operation, thinking and inquiry, guide children to think in operation, and take operation as exploration knowledge; Taking operation as the carrier, it is a means to give full play to children's imagination.
Teaching objectives:
1, let children explore the methods of spelling and counting angles through the practical operation activities of "spelling, cutting and counting".
2, through the operation activities, enhance children's awareness of participation, cultivate operational ability and good operating habits.
3, through the operation activities, improve children's observation and analysis ability, initially cultivate the flexibility of thinking and develop children's intelligence.
Activity preparation:
Teaching AIDS: each with graphic scissors.
Learning tools: triangle, square, trapezoid and rectangle, two for each person, one pair of scissors and three pieces of square paper, one for each person.
Activity flow:
First, review.
Know all kinds of graphics.
What graphics are there? Can you name them? (Square, rectangle, trapezoid, triangle) The edge knows the number of corners of the graph.
Second, spell the corner, spell some graphics according to the provided graphics.
1, teacher; "Today, let's play a jigsaw puzzle. Can you make a square with two figures? The children try to show their pictures on the blackboard.
2. Guide children to spell out rectangles, trapezoids and triangles.
3. Teacher's summary: My friend used his cleverness to spell out so many numbers, which is really clever.
Third, cut corners.
Teacher: We already know that a square has four corners. What happens if you cut one knife at a time? (Let children think)
Let's listen to a story: one day, a little monkey, a little white rabbit, a rooster and a kitten were playing games happily together. The little monkey took out three square pieces of paper and distributed them to three good friends. Then he said, "Today I will test you to see who can think. If you cut off one corner of a square with a knife, how many corners are there? " The little white rabbit sipped his mouth, thought for a moment and said, there are three more. The rooster picked up a square, cut off a corner and said, "I think it should be five." The kitten also picked up a square and folded it first, saying, "I think there are still four corners." (Show three cubes, three rabbits, five cocks and four kittens while telling a story) Three small animals immediately argue that their answers are correct. Teacher: Children, please take out a square piece of paper, think about it first, fold it, cut it again, and finally help the little monkey evaluate who is right in their answer. The children start to fold, cut and discuss, and the teacher will patrol and guide. Teachers and students discuss with each other, and children take the stage to demonstrate their own paper-cutting methods. After reading the child's conclusion, I think the little monkey will smile and say to its three friends, "You don't have to fight. All three of your answers are right, but you should consider the problem comprehensively in the future." Teacher: Now we know that when a square is cut with a knife, it may have three, four or five corners.
Activity expansion:
Just now, I cut the square with one knife and cut off a corner. There are three situations. If one corner of a square is cut off by two corners, how many corners are left in this figure? Leave it to the children to try, and we will discuss it next class.