The lesson plan "Decomposition of 8" for large classes in kindergartens contains reflections 1 1. Talking about teaching materials.
The decomposition of "8" is the content on page 30 of the first volume of mathematics, a new book for preschool children. Mastering the decomposition of 8 is the basis of 8 subtraction. According to the characteristics of children's age and the reality of students' life, velvet teaching AIDS are selected in the teaching materials, so that children can master the decomposition of 8 intuitively and quickly, experience the happiness of learning mathematics and cultivate their feelings for mathematics. It also reflects the scientific education goal of the second part of the Kindergarten Education Guidance Outline: to feel the quantitative relationship of things from life and games, and to appreciate the importance and interest of mathematics.
Second, talk about learning objectives.
1, knowledge goal: Through the decomposition of 8, we know that there are seven different ways to divide 8 into two parts and learn to divide it in order.
2. Ability goal: Cultivate children's ability to cooperate with classmates through operation.
3. Develop good qualities of thinking, doing, studying hard and being happy to learn.
4. Willing to explore, communicate and share.
Third, focus on the difficulties and key points.
Master the decomposition of 8 through activities.
Difficulty: divide math in order 8.
Fourth, the teaching method of speaking.
In this class, students are the masters of learning, and teachers are the organizers and guides of mathematics activities. In this class, I attach great importance to students' active participation, so that children can learn, think and master mathematics knowledge in activities and develop in activities.
V. Representing learning methods (learning situations)
1, children are active and playful, with short concentration time and strong desire to express themselves. Mathematics classroom needs teachers to effectively mobilize students' hands, mouth and brain, so that children can participate in learning activities with multiple senses.
2, the decomposition of the previous 2-7 has been learned, so children have a certain knowledge base, hands-on ability, language expression ability, observation ability, and it should be relatively easy to learn new knowledge.
Sixth, talk about the teaching process.
(1) Introduction: Show the number "8" on the blackboard and ask: What is this number, children? Do you know each other? (Children's response) Today we are going to learn "Decomposition of 8". -The blackboard title "Decomposition of 8"
(2) Study the decomposition of 8.
Guess the bean game: review the decomposition of 2-7.
(1) The teacher shows 8 apple teaching AIDS, and asks the children to name and quantity, and then sticks 8 digital cards beside them.
(2) The teacher asked the children to think about how to divide the eight apples into two people and how to divide them. And ask the children to show it on the blackboard with teaching AIDS.
(3) Teachers put digital cards next to the numbers divided by seven methods.
(4) The teacher took all the apples and left a digital card to let the children know that the number 8 can be divided into seven different groups. Recognition: read the decomposition of 8. (8 can be divided into 1 and 7. Strengthen children's impression and understanding of the decomposition of 8 through reading. After reading it, how many kinds of decomposition are there for counting eight?
(5) The teacher used the stones and digital cards in the calculation bag to guide the children to teach themselves 7 kinds of 8.
Through this exercise, strengthen children's understanding of the decomposition of "8" and prepare for the addition and subtraction of "8" in the next link. )
(3) Understand the law of increase and decrease of two parts of a number. Guide children to observe the decomposition and arrangement of the above 8. What changes have been made to the figures on both sides? (The number on the left decreases one by one, and the number on the right increases one by one, and the total number remains unchanged. )
(4) summary. A number can be divided into two smaller numbers, one decreasing and the other increasing, and the sum remains the same.
(5) Children are required to create 8 decomposition stories freely and develop their imagination.
Ask individual children to tell their own stories, and find a story that everyone likes as the decomposition story of all of us.
Teaching reflection
1, the goal of this course is clear and the difficulty is moderate. Most children can understand and learn to operate by themselves. Children's hands-on ability is better than teaching, and they are interested in learning.
2. Disadvantages: The teacher is not naive enough. The class time is too long. Exercise yourself more after class and constantly improve your ingenuity.
The lesson plan "Decomposition of 8" for kindergarten large classes contains the design background of the activity of Reflection 2.
Let children understand mathematics in life.
Activity purpose
1, the process of decomposing and combining 8.9 items by force and perceiving the decomposition and combination of 8 and 9.
2. Feel the relationship between the total number and the number of parts.
3. Cultivate initial observation and thinking ability.
4, like math activities, willing to participate in various arithmetic games, and cultivate rebellious thinking.
5. Experience the fun of math group games.
Teaching emphases and difficulties
8, 9 decomposition combination, feel the relationship between the total number and the number of parts.
Activities to be prepared
1. Teaching AIDS: "Chip", "Digital Card" and "Switch"
2. Learning tools: one copy of "chip", "digital card", "fractional line" paper and pen container.
3. Page 27 of the operation manual.
Activity process
First, review the decomposition and combination of numbers with the game of "number touching the ball"
Second, learn the decomposition and combination of 8.
1, the teacher gave each child eight chips, divided them into two parts according to his own ideas, and recorded the decomposition results with "digital card" and "score line". First of all, please show your division and results to children who are divided into 7 and 1, and guide them to feel that 8 is divided into 7 and 1 or 7 and 1, although the order of the two numbers has changed.
2. Please show children who divide 8 into 2 and 6, 3 and 5 their decomposition process and results, and guide them to find out the results of the other two records by this division. When the two parts are added and exchanged, the total amount is the same.
Please show the children different points: 8 is divided into 4 and 4.
4. Let the children read the decomposition and combination of 8 collectively and completely.
Third, the decomposition and combination of learning 9
1, the teacher gave each child nine chips, asked the children to try to record the results of each assignment on paper, and guided the children to put the split type according to the law that some scores increased and the other scores decreased, and then found the split type with the same number.
2. Show the results of children's decomposition on the blackboard and check.
Fourth, game activities: play the finger game "Find the number of parts".
Fifth, exchange and summarize, and tidy up school tools.
Activity expansion of intransitive verbs: Complete the operation manual P27
Teaching reflection
1, the goal of this course is clear and the difficulty is moderate. Most children can understand and learn to operate by themselves. Children's hands-on ability is better than teaching, and they are interested in learning.
2. Disadvantages: The teacher is not naive enough. The class time is too long.