Compare the light and heavy class teaching plan 1 activity goal:
1. Know the balance, learn to use it, and measure the weight of the object in a scientific way.
2. Learn to sort three or four objects by weight, and perceive and understand the relationship between sequences.
3. Cultivate children's curiosity about things and be willing to explore and experiment boldly.
4. Willing to try boldly and share experiences with peers.
5. Stimulate children's interest in scientific activities.
Activity preparation:
Several pairs of comparison projects
Activity flow:
First, please choose 3 (or 4) kinds of fruits and vegetables for your child. It is more important to use the existing experience.
1. Are these melons and fruits the same weight? How to distinguish between light and heavy?
2. Guide children to weigh each melon and fruit by hand, and then arrange them in numbers according to the weight of the objects in the hand-weighing column on the recording table. Guide children to know that the weight of objects is relative, and learn to try to rank three objects by weight.
Second, the teacher has doubts: some melons have little difference in weight, so it is difficult to pick them out by hand. What should I do? (Showing two melons of similar weight)
Question: How can we know which of the two melons is heavier and which is lighter?
Third, know and use the measuring tool-balance.
1. This paper introduces how to use the balance (the line of sight must be centered, and articles should be handled with care) and how to use the balance to judge the weight of objects (articles will be light when they are tilted and heavy when they sink).
2. Guess: Which of the two melons is lighter? Which is heavier?
3. Verify which of the two melons is lighter and which is heavier by balance measurement, and learn the use method of the balance preliminarily.
4. Measure and verify the accuracy of the weight of the three objects sorted by hand in the previous link with a balance.
Fourth, guess who is lighter and who is heavier.
Show melons and fruits of similar size, let the children guess which is light and which is heavy, and then verify it with a balance.
Activity reflection:
This activity was led out in kind by melons. Ask the children to come up with a comparison method in their own way, by looking with their eyes, weighing with scales and thinking with life experience. Teachers should use more expansive topics to guide, and then some children take out the degree of paper sinking to compare. The methods are changeable, but sometimes the teacher still lacks activities, and likes to repeat the children's words, which requires constant reflection.
Teaching goal: to be able to perceive and distinguish the weight of an object, and use the weight appropriately to describe the characteristics of the object.
Teaching preparation: 1, sandbags of different sizes, calibration.
2. Several washbasins, several wooden blocks with the same size, and several small objects with different weights.
3. Pencils and markers.
Teaching process:
1, group activities
1) Weigh sandbags. Let the children take any sandbag, then weigh, compare and talk about whose sandbag is heavy and whose sandbag is light.
2) Let the children hug each other and tell who is more important than who is lighter.
2. Game: "Guess the weight".
1) The teacher chooses any two small items in the classroom and lets the children judge the weight by visual inspection and manual weighing.
2) The classroom can use scales to determine whether each child's judgment is correct.
3, group activities, let the children use the balance to compare the weight of some small items in the classroom.
4. Group talk: What other methods can distinguish the weight of an object?
5. Small experiment: What's the weight on that piece of wood?
1) Let the children put different small items on two blocks floating in the same washbasin, judge which block is heavy according to the ups and downs of the blocks, and think about the reasons. 2) The teacher explained a simple method to judge the weight of an object through the ups and downs of the hull: the deeper the hull, the heavier the things on board. You can also tell children the story "Cao Chong is an elephant".
6. Guide children to complete the exercises in the book: Please mark objects with different weights.
7, outdoor games: seesaw
1) Children are free to play on the seesaw and guide them to discover the principle of the seesaw.
2) Let 2-3 children with large weight differences compare on the seesaw, find out the heaviest and lightest, and let the children understand that the weight is relative.
3) Let children think about how to play on the seesaw for fun.
Compare light and heavy class lesson plan 3 Activity objective:
1. Compare the weights of two or three objects through operational perception, and learn to make records.
2, preliminary perception of the relationship between the size, quantity, material and weight of the object.
3. Be interested in mathematical operations, and improve the ability of analysis, comparison, judgment and reasoning through operations.
Activity preparation:
Self-made simple balance weighs one person, operating materials (a marble, a plastic bear, a paper ball and five snowflakes), two recording papers and a watercolor pen. Two teacher's notes.
Activity flow:
1, comparing the weights of two bears leads to the topic.
2. Children compare the weights of two objects and make records.
3. Summarize the survey results.
It is also a paper ball. Under what circumstances will it be heavier? (large capacity)
(2) It is also a snowflake. Under what circumstances will it be heavier? (in large quantities)
(3) Why are the paper balls big and the marbles small, or are they heavier than marbles? (Different materials)
(4) Why are there so many snowflakes and only one marble, which is heavier than the marble? (Different materials)
4. The teacher's operation record compares the weights of three bears.
5. Children's operation records compare the weights of three different materials.
Compare light and heavy class teaching plan 4 activity objectives:
1, by comparing the severity, let children perceive and learn the methods of more severity.
2. Let children learn to compare the weight of objects and classify them according to their weight.
3. Improve children's perception.
Activity preparation:
1, a clothes hanger
2. Three identical mineral water bottles (one filled with water, one filled with half water and one empty bottle) and three identical jars (one filled with water, one filled with half water and one empty bottle).
3, a large number of building blocks, a small number of building blocks with the same size and shape (tied together according to the number of 3, 6, 10)
4. Some cotton sandbags, bean paste bags, basketball, iron balls, apples, pears and oranges.
5. Learn how to use balance in life activities and regional activities.
Activity flow:
First, show a balanced clothes rack for children to observe and ask questions:
Teacher: Do you know what this is, children? What does it do? (for hanging clothes) Now I'll hang it in the front. Where is it? (level). Please look at it again: I hung a bag of rubber on one side of the hanger. What changes have you observed in the clothes rack? (The rubber side hangs down) Why? You're watching. I hung a ruler on the other side of the hanger. What changes will you find? (One end of the ruler hangs down and the other end of the rubber hangs up) Why? Or what does this mean? One end of the ruler is heavier than the other end of the rubber.
Teacher: The children are very clever. They know how to hang things on a balanced hanger. The heavy end hangs down and the light end goes up. Clothes hangers can help us distinguish which objects are heavy and which ones are light.
Second, show mineral water bottles, cans and other items of the same material and compare their weights.
( 1)
1, Teacher: I have three mineral water bottles (one full, one half full and one empty). Do you know which bottle is heavy? Which bottle is lighter? how do you know
Young children: the weight of water; Half a bottle of water is light; Lightest empty bottle (visual inspection)
Teacher: Ask the children to verify and weigh it with their hands. Which bottle do you think is heavier? Which bottle is lighter?
2. Sort from light to heavy and from heavy to light.
Teacher: Now, the children know which is heavier and which is lighter. Please sort from light to heavy and then from heavy to light. Please operate it by individual children.
(2)
1, Teacher: Mineral water bottles are transparent. Children can tell which bottle is heavy and which bottle is light with their eyes. I have three identical opaque jars here. How do you know which is heavier? Which jar is lighter? (One filled with water; An empty one; Half a can) and arranged in order from light to heavy.
2. One big building block and one small building block
3. Building blocks of the same size and shape and different building blocks (3 building blocks are tied together; 6 pieces tied together; 10 pieces tied together)
Children can watch, play, weigh and classify freely.
5. The teacher and the child verify the child's operation together. Summary: In the same can, the lightest is empty, the lightest is filled with half a bottle of water, and the heaviest is filled with water; The same building blocks, big and heavy, small and light; Building blocks of the same size and shape, more building blocks are heavy, fewer building blocks are light.
Third, compare the weights of different items.
( 1)
1, big cotton sandbag, small bean sandbag
Teacher: Please guess which sandbag is heavier and which is lighter?
2, basketball, iron ball
Teacher: Which of the two balls is the heaviest and the lightest?
Apples, oranges and pears are almost the same size.
Teacher: These three fruits are about the same size, so it is difficult to compare them by weighing. How can we compare the weights of these three fruits? Come on, kids, have some fun.
(2) Children play
1. Collective discussion: Why is the big cotton sandbag light and the small bean sandbag heavy? Why is the big ball light and the small iron ball heavy?
2. Ask individual children to verify how to compare the weights of apples, pears and oranges (with scales).
Fourth, competition.
Two groups of competitions: two objects with different weights are mixed together, and each group of children negotiates to arrange one for each person. Compare the weights of similar objects and put them in two boxes with weights written on them. The fast and correct group is the winning group.
The other two groups of competitions: different weights and different types of objects are mixed together. Please order the children from light to heavy, and the correct group is the winning group.
Five objectives of comparing light and heavy class teaching plans
1, we can know that items have different characteristics of light and heavy.
2. Compare the weights of two objects with the senses.
prepare
Two schoolbags (one empty, one for books), pens, glass bottles, iron blocks, stones, building blocks, plates and other physical objects, and several exercise books.
process
1, the use of senses is more important.
L' schoolbags and empty schoolbags are difficult to read, please carry them by children.
Question: What's the difference between two schoolbags?
Conclusion: Empty schoolbags are light, while schoolbags with books are heavy.
L children operate in groups and perceive the weight of various materials.
Take two items from the plate and compare whether they are the same weight, what is light and what is heavy.
2. Children's operation exercise: How many apples should I put?
Draw the lost apples on the homework list.
suggestion
Put the operation data in the mathematical corner to give children the concept of consolidating the weight of the object.
Compare the design background of lesson plan activity 6 in light and heavy classes
With the growth of age, children in large classes are more and more interested in activities such as hands-on operation, simple comparison, classification, estimation and judgment, and are interested in the weight and size of different items in their surrounding lives, and like to try to compare. In view of this feature, therefore, I designed a mathematical activity: compare weights, let children learn to compare the weight of objects through natural estimation, judge the weight of objects through visual inspection, hand holding and other methods, and develop children's perception and judgment ability.
moving target
1. Learn to compare the weight of objects by natural estimation methods such as weighing, trial and comparison.
2. Be able to correctly judge and express the weight of an object in fluent and complete language.
3. Experience the pleasure and success of comparing the weight of objects in various ways.
4. Cultivate children's interest in calculation and the accuracy and agility of thinking through various sensory training.
5. Cultivate children's habit of speaking while operating.
Teaching emphases and difficulties
1, learn the method of estimating and comparing the weight of objects naturally.
2, can correctly judge and use fluent and complete language to express the weight of the object.
Activities to be prepared
1. one plush toy for bear, rabbit and duckling; Seesaw; Computer courseware.
2. Everyone has a study basket, which contains two wooden building blocks of different sizes, two glass balls of the same size, a cotton ball, a small magnet, two identical cups and a proper amount of water.
Activity process
1. scene import.
Use seesaws and plush toys to create an animal park and demonstrate it. Inspire children to compare the weight of small animals through visual judgment, and tell who is the heaviest, the lightest and the neither heavy nor light among several small animals. Judging the severity by visual inspection is vivid, natural and childlike, which not only successfully guides the activities, but also stimulates the children's interest in learning.
2. Explore all kinds of materials.
Guide children to make full use of learning tools to operate, feel the weight of different objects and learn to compare the weight of objects.
(1) Choose two items at random, and feel that some items are light and some items are heavy. Put it in your hand and say how you feel. Some things are heavy and some are light. )
(2) Comparing wooden building blocks of different sizes, we know that big building blocks are heavy and small building blocks are light.
(3) Compare the weight of glass balls with the same size.
(4) It is found that cotton balls of the same size are light and glass balls are heavy.
(5) Comparing the big cotton ball with the small magnet, the child feels strangely that the big cotton ball is light and the small magnet is heavy.
3. Application in life.
Provide children with two identical cups to stimulate their learning initiative and creative thinking.
(1) Compare and judge the weights of the two cups first.
(2) Guide children to explore freely through various ways of thinking and experience changing the weight of objects.
Teachers guide children to compare the weight of two identical cups in life, introduce activities into life and guide children to learn in life. Comparatively speaking, children explore how to change two cups with the same weight into cups with different weights, which stimulates the creativity of children's thinking, and the cultivation of thinking quality is an indispensable and important goal of mathematics activities in large classes.
Through the previous activities, children have a perceptual understanding of weight. In order to further enhance their experience and challenge their thinking, the comparison of different watermelons and pears, candles lit with the same weight, balls in scales and melted ice have created good conditions for children to explore and compare, further activating their thinking and expanding their thinking in the debate.
Teaching reflection
This activity comes from children's life and embodies the educational concept of respecting children's development and making children the initiative of learning and the main body of activities. At the beginning of the activity, the teacher introduced the activity in the form of games and chose the life scene of seesaw, which made the children interested in comparison in a relaxed and natural atmosphere. Then, the teacher guides the children to compare familiar objects in daily life. They ask questions from different angles by comparing different objects in different forms, which stimulates children's positive thinking and exerts their creativity. The whole activity is well-designed and closely linked. Children compare the weight of objects in the process of hands-on operation, brain thinking and language expression, and experience the fun of comparing the weight of objects in various ways.
Encyclopedia: weight refers to the weight of weight, and then know the weight; Degree, then know the length. Language Zuo Zhuan
Compare light and heavy class teaching plan 7 activity objectives:
1. Let children learn more important methods through activities and learn to record initially.
2. Cultivate children's observation ability and hands-on ability.
3. Experience the life of mathematics and the fun of mathematics games.
4. Understand the relativity of more and less.
Activity preparation:
1, two eggshell dolls, a basket of toys, a bucket of water, a rag doll, an apple, a pear and a citrus.
2. Every child has a self-made balance scale and a small basket (filled with glass beads, wooden beads, plastic products, etc. ), recording paper, pen, etc.
Activity flow:
1, the teacher showed two eggshell dolls: "Today, the teacher brought two little dolls to the children. What are they made of? " These two little dolls, one is made of eggs and the other is made of eggshells. Let the children find a way to tell which is the egg. "Please ask a child to come forward and tell the way. The teacher concluded: "Just now this method is called nudge nudge. "
2. Show all kinds of toys and materials, let the children group and compare their weights in various ways. Teacher: "How can you tell its weight?" Inspire children to say: take one end, mention it, hug it and compare the weight of the object.
The teacher took out a self-made balance and said, "If you want to compare the weight of objects accurately, you can also use the method of weighing." The teacher put the wooden beads at one end of the balance and the glass beads at the other end, so that the children could observe which side was heavy and which side was light. The teacher summed up: "Glass beads are heavy, wooden beads are light, heavy ones hang down, and light ones tilt up." (Learning vocabulary: vertical and vertical)
4, children's first group operation activities-compare the weight of two objects.
(1) Let the children take out two things from the basket and compare them.
(2) Ask children to communicate the operation results with their peers.
5. The teacher shows three kinds of fruits: "Teacher, here are three kinds of fruits, apples, pears and oranges. Who is heavy and who is light? " Ask a child to say the conclusion with the teacher's balance, and the teacher will demonstrate the result on the recording paper on the blackboard. (Learning words: neither light nor heavy) 6. Children's second group of operation activities-compare the weights of three objects.
(1) Let the children take three things from the small basket.
(2) Let the children record the operation results.
Activity reflection:
This activity comes from children's life and embodies the educational concept of respecting children's development and making children the initiative of learning and the main body of activities. At the beginning of the activity, the teacher introduced the activity in the form of games and chose the life scene of seesaw, which made the children interested in comparison in a relaxed and natural atmosphere. Then, the teacher guides the children to compare familiar objects in daily life. They ask questions from different angles by comparing different objects in different forms, which stimulates children's positive thinking and exerts their creativity. The whole activity is well-designed and closely linked. Children compare the weight of objects in the process of hands-on operation, brain thinking and language expression, and experience the fun of comparing the weight of objects in various ways.
Compare light and heavy class teaching plan 8 activity objectives:
1. Let children learn more important methods through activities and learn to record initially.
2. Cultivate children's observation ability and hands-on ability.
Activity preparation:
1, two eggshell dolls, a basket of toys, a bucket of water, a rag doll, an apple, a pear and a citrus.
2. Every child has a self-made balance scale and a small basket (filled with glass beads, wooden beads, plastic products, etc. ), recording paper, pen, etc.
Activity flow:
1, the teacher showed two eggshell dolls: "Today, the teacher brought two little dolls to the children. What are they made of? " These two little dolls, one is made of eggs and the other is made of eggshells. Let the children find a way to tell which is the egg. "
Ask a child to stand up and tell the way.
The teacher concluded: "Just now this method was called" nudge nudge ".
2. Show all kinds of toys and materials, let the children group and compare their weights in various ways.
Teacher: "How can you tell its weight?"
Inspire children to say: take one end, mention it, hug it and compare the weight of the object.
The teacher took out a self-made balance and said, "If you want to compare the weight of objects accurately, you can also use the method of weighing." The teacher put the wooden beads at one end of the balance and the glass beads at the other end, so that the children could observe which side was heavy and which side was light. The teacher summed up: "Glass beads are heavy, wooden beads are light, heavy ones hang down, and light ones tilt up." (Learning vocabulary: vertical and vertical)
4. Group operation activity-compare the weights of two objects.
(1) Let the children take out two things from the basket and compare them.
(2) Ask children to communicate the operation results with their peers.
5. The teacher shows three kinds of fruits: "Teacher, here are three kinds of fruits, apples, pears and oranges. Who is heavy and who is light? " Ask a child to say the conclusion with the teacher's balance, and the teacher will demonstrate the result on the recording paper on the blackboard. (Learning words: neither light nor heavy)
6, children's second group of operation activities-compare the weight of three objects.
(1) Let the children take three things from the small basket.
(2) Let the children record the operation results.
Teaching reflection:
This activity comes from children's life and embodies the educational concept of respecting children's development and making children the initiative of learning and the main body of activities. At the beginning of the activity, the teacher introduced the activity in the form of games and chose the life scene of seesaw, which made the children interested in comparison in a relaxed and natural atmosphere. Then, the teacher guides the children to compare familiar objects in daily life. They ask questions from different angles by comparing different objects in different forms, which stimulates children's positive thinking and exerts their creativity. The whole activity is well-designed and closely linked. Children compare the weight of objects in the process of hands-on operation, brain thinking and language expression, and experience the fun of comparing the weight of objects in various ways.