Children in large classes have learned the decomposition of numbers 2-6 and know how to decompose numbers, but the internal understanding is not very clear, and there are also some students who can't decompose numbers and operate them manually. And children don't seem to be very interested in decomposing numbers. Pleasant goat and taro ash have been playing on TV channels, and children usually talk about the plot of this cartoon. When they were arguing about this, an idea suddenly occurred to me. Why not divide them into different sheep teams according to their favorite sheep? See which sheep is the best. Stimulate their interest in learning digital decomposition through competitions. In this way, taking the form of group activities in the activities is also conducive to the cultivation of cooperative consciousness and ability of large class children.

moving target

1, children learn the decomposition and synthesis of 7 through cooperative communication, and perceive the order of the sum of numbers.

2. Let children learn and develop together in independent exploration, cooperation and exchange, and fully experience the happiness of group mutual assistance and cooperative learning.

Activities to be prepared

1, pictures of watermelons and peaches of different sizes, colors and shapes, different kinds of mosaic toys and waste materials.

2. Music tape: "Where are my friends?"

3. Cards with numbers of 1-6 in different colors or patterns.

4, 7 typing record table.

Activity process

First, the creation of situations

1, clap your hands game: the teacher reviews the composition of 6 with the children by asking and answering questions.

Teacher: Hey, how many balls did my 1 ball touch?

Child: Hey, your 1 ball touched five balls.

2. Each group leader reports by himself, and the teacher puts corresponding stickers on each group.

3. Teacher: Every child in our sheep team is excellent. Today, the teacher specially invited a friend (show the number 7) for you, and let the number 7 be the referee to judge which sheep team won the final victory.

Second, the sheep sheep war

1, Judge No.7 prepared 7 items for each of our children. (Showing watermelons, peaches, mosaic toys and some waste), but the number 7 can give you requirements:

(1) Please don't move after each group gets seven items. Observe the similarities and differences of these items first, then divide these items into two parts and tell me what is the basis of your division. Turn your head to see which group has more methods.

(2) Fill in your scoring results on the scoring record.

2. Children are recorded in groups, and teachers patrol and give individual guidance.

Pleasant Goat Team Material: Peach Blossom Map;

American sheep team material: watermelon map;

Boiling sheep team material: goldfish pictures;

Lazy sheep team material: mosaic toys;

Jonie team materials: milk boxes and bottles;

Slow sheep team materials: all kinds of cartons (toothpaste boxes, medicine boxes, cigarette cases). etc

3. Children's report

Mei Yangyang Team: Teacher, our group divides 7 into 1 and 6 according to the size of watermelon.

Pleasant Goat Team: Our team divides 7 into 2 and 5 according to the types of peaches.

Team Jonie: The materials in our group are all about milk drinks. 7 is divided into 3 and 4 according to boxes and bottles;

4. The teacher summed it up.

How many decomposition methods can guide children to summarize 7?

Judges No.5 and No.7 awarded winning prizes and encouraged them.

Third, the game: Where is my friend?

1. The teacher gives each child a digital card.

2. Find friends.

Music "Where are my friends?" Children are singing and looking for their good friends with digital cards in their hands.

Children check each other and find suitable friends.

4. Report.

I am Strawberry 3, I am Strawberry 4, and together we are the number 7. We are good friends. (Two good friends hug each other)

Fourth, extension.

We have studied the decomposition of numbers 2-7, and we also know that there are many ways to decompose them. Please go home and explore for yourself how many ways the number 8 can be decomposed and what rules can be found.

Teaching reflection

In order to stimulate children's interest in learning and desire to explore, the teacher started with cartoons that children are interested in and divided the children in this class into six groups according to their preferences. Combining with the age characteristics of large-class children, taking the form of group activities in the activities is not only conducive to the cultivation of large-class children's sense of cooperation, but also to the germination of children's sense of competition. The children's enthusiasm in the activities is very high. Every child can really participate in the activities, speak, divide and write, and really let the children "play with learning". Games are also very interesting activities for children. Through the game "Where are my friends?" Children find their good friends while singing with digital cards, so that children can fully feel the synthesis process of the number 7.