Small class mathematics is more light and heavy, and more light and heavy children s mathematics les

Event Name:Relatively light and heavy.

Objectives:

1. Learn to measure the weight of an object with a balance.

2. Know that the big object is not necessarily heavy, and the small object is not necessarily light.

Preparation for the activity: cartons, balances, building blocks, marbles, plastic balls, leather balls, iron balls and other items.

Activity process:

1. Ask children to compare the weight of objects with their previous experience among many objects.

Are these objects the same weight? "Encourage toddlers to weigh with their hands.

2. Help children discover that the weight of objects is relative.

Ask the toddlers to compare the light and heavy plastic balls and the leather balls, and then compare the light and heavier leather balls and the iron balls. Help children establish relative concepts: the ball is heavier than the plastic ball; Leather balls and iron balls are lighter than leather balls.

3. Inspire children to use their brains: The difference in the weight of some objects is very small, and it is difficult to pick it out by hand. What to do?

Show two items of similar weight: "How can I know which of these two things is heavier and which is lighter?" (Inspire children to speak in their own way, affirming children's imagination and speech.) ）

4. Introduce the measuring tool - balance.

Children try to measure the weight of objects with a scale, and introduce the use of the balance, the front sight must be centered, and the handling should be light.

5. "Guess which of these two things is lighter and which is heavier?" "Ask the child to measure and verify with a balance.

6. Choose items with the same volume and different textures to be lighter and heavier, and understand that the large volume is not the same as the heavy, and the small volume is not necessarily light.

Show two boxes of different sizes for the toddler to guess which is lighter and which is heavier, and then verify it with a scale. For example, cotton is placed in a large box, and iron is placed in a small box.

7. Invite the children to give examples of what other examples of this are in their lives.

Suggested activity: Place a balance in the class to guide children to become interested in the balance and explore the function of the object.

Activity extension: 1. Take children to look for two things that can be compared indoors or outdoors for weight comparison.

2. Parents and children are invited to read books and make intellectual games with children: compare who is lighter and who is heavier.

Objectives:

1 Through the activities of looking, checking and weighing, children can learn the more important methods and initially learn to record.

2. Let children experience the weight of objects and the weight of objects'There is no necessary connection between the size of the volume.

3. Cultivate children's observation ability and hands-on ability, improve the ability of group cooperation, and cultivate the spirit of exploration.

Event Preparation:

1. Animal background picture: one grassland; Animals**: horse, elephant, rabbit, puppy, mouse, seesaw; A number of arrows.

2. Physical objects: teaching books, stationery boxes and other foods that can be compared to light and heavy.

3. Apples and pears with similar weights; Homemade balance weighs one, apple, pear, orange each, 4, every two children a homemade balance scale, a small basket (pen, paper, record sheet several, containing glass beads, wooden beads, plastic accumulation, etc.) pens and so on.

Activity process:

1. Create a situational division:

1. What kind of animals are coming to Animal Paradise? What are they doing? (Oh, horses, elephants, rabbits, bears, and monkeys playing on seesaw!) ）

2. Do you know who is lighter and heavier between the bear and the monkey? In this lesson, we will learn to compare the light and the heavy. Present the topic.

Second, ** new knowledge

1. Take a look, guess, compare:

Teacher: (1) There are so many animals on the grass, do you know who is lighter and who is heavier?

2) How do you mark the weight? (arrows).

2. Compare and compare: show all kinds of toys and materials, and let the children compare their weight in various ways.

1) Math books and stationery boxes, can you tell which of them is lighter and which is heavier?

You all think you can't see it with your eyes)

So, what can you think of to compare them?

2) Teacher: Now ask a child to compare the weight of the math book and the stationery box by the method of checking it, the teacher has a lot of things, what method do you use to distinguish its weight? (End of the end, mention it, check it).

3) A toddler said that he repeatedly weighed an apple and a pear, and their weight was not very clear. (By the way, we can weigh with the help of scales, and now, we can weigh with scales like balances.)

4. Weigh one and compare one to one.

1) (The teacher demonstrates the name of apples and pears) Teacher: Who is lighter and who is heavier? How can you tell? (Many students read it.)

When it comes out, the side where the apple is placed is short, which means that the apple is hanging down, and the side where the pear is placed is high, which means that the pear is lightly upturned.

This side is vertical, this side is warped).

5. Children are --- comparing the weight of two objects in the first group operation activity.

1) "If you want to accurately compare the weight of an object, you can also use the method of weighing, ask the children to take two things from the basket in groups of two to compare the weight and take turns.