Teaching objectives:

1, through observation, discovery, reasoning and other activities, students can discover the arrangement law of simple graphics.

2. Being able to use laws to solve some simple practical problems and feel that mathematics is around us.

3. Cultivate students' observation, reasoning, practical ability and innovative consciousness, and cultivate students' consciousness of discovering, appreciating and creating mathematical beauty.

The emphasis and difficulty of teaching: discovering the law and creating it.

Preparation of teaching AIDS and learning tools: courseware; Each student is given an admission ticket, blank paper and a box of colored pens; Each group has aprons and Kobanawa patterns of different colors.

Teaching process:

Play music before class. Happy birthday.

Teacher: Whose birthday is it today? Do you want to know? We'll find out later in class.

Design intention: Play happy birthday songs, create an atmosphere, and make the math class full of strong life breath.

First, create situations and introduce rules.

(Courseware shows birthday pictures)

Teacher: Big-headed son's birthday, little-headed father and apron mother held a birthday party for him, and fruits were being placed. The courseware demonstrates two groups of watermelons and pineapples. )

Teacher: Guess what's next? (Watermelon and pineapple) Why?

According to the students' answers, the courseware demonstrates that watermelon and pineapple are a group. )

The teacher concluded: We say that things like watermelon, pineapple, watermelon and pineapple are arranged regularly. In this class, we learn to find the law together. (revealing the topic)

Design intention: To create a lovely birthday scene for the big-headed son, so that students can perceive the law from life during the process of putting fruit, and stimulate students' desire to explore new knowledge.

Second, observe communication and look for rules.

(The courseware shows the map of the birthday party venue)

Teacher: Look, the venue for the birthday party has been arranged. Is it beautiful?

Look carefully. What things are arranged regularly in this picture? What are the rules?

Think independently first, and then tell your deskmate what you found.

Teacher: Who will tell me your findings? (Click on the courseware. )

The arrangement of lanterns is regular. )

Teacher: What are the rules? Tell the whole story. (fuchsia, fuchsia)

Teacher: What color is the next row?

Teacher: Who has found something new?

The arrangement of small flowers is regular, one is green and the other is purple. )

Teacher: You observe very carefully. What color is the next row? (green)

Teacher: Who found something unusual?

(Colorful flags are arranged neatly, one side is red and the other side is yellow-)

Teacher: What color is the next row? (red)

Teacher: Who found more?

(Children's teams are also regular)

Teacher: Tell me your opinion. (A boy and a girl)

Teacher: You start with a boy. Do you have any different opinions? (A girl, a boy)

Teacher: Yes, it's a round team. We can start with boys or girls. If you stand like this, will it be a boy or a girl next? (girl)

Teacher's summary: We found the arrangement rules of colorful flags, small flowers, lanterns and children's teams at the meeting place. (Courseware demonstration) Like a red and yellow colored flag, a green and purple flower, a purple and red lantern, a man and a woman are in the children's team, all called a group. If this group is arranged repeatedly, we can find its law according to one of them.

Design intention: Using interesting teaching resources, let students observe, discover and summarize by themselves, cultivate students' ability to acquire knowledge and develop students' thinking.

Third, exciting practice and application of rules.

1, apply one coat.

Teacher: The birthday party is about to begin. Let's get the tickets ready quickly. (The courseware shows the admission ticket.) Teacher: This is an admission ticket with a regular color change. You can go in as long as you color it correctly.

Let the children take out the admission ticket and colored pens, observe carefully, find out the rules, and then color them. (Students draw admission tickets)

Teacher: What are the rules for the color arrangement of the first row of figures? (Student exchange, report)

What about the second line? What is the law of the third line? (According to the students' answers, the courseware reveals the answers)

Teacher: Is it right? Ask each child to be a small ticket inspector, exchange tickets at the same table, declare him passed if he draws correctly, and ask him to correct it immediately if he draws wrongly. (Students check tickets with each other)

Teacher: Teacher congratulates you all on getting the tickets. Now we can enter the meeting place. Are you happy?

Step 2 do this

Teacher: Here comes the birthday boy. Let's wish him a happy birthday. You sing and the teacher acts. If you understand the rules of action, just follow the teacher. Happy birthday when the courseware is played. The teacher moves with the melody and the students move with it. )

Teacher: How clever! You learned the teacher's movements so quickly! Can you also learn from the teacher and make up some regular movements? Discuss in the group and try to make up for it. Work in groups and create actions. )

Teacher: Which group wants to show it? (Classroom demonstration)

Teacher: Regular movements are beautiful!

Step 3 guess

Teacher: Big-headed son sees that everyone is so smart and wants to test everyone. Dare to accept the challenge? Show page 87, do it and answer by name. )

Design intention: Let students feel the law further, and apply it in the activities of drawing, doing and guessing that they are interested in, so as to provide thinking methods for creating the law.

Fourth, hands-on operation, creating laws.

1, swing it.

Teacher: Who else does Big Head want to compete with? Please take out the blank paper, and the group leader will take out the learning tools and put them on the blank paper to design the rules you like. The students are playing on the swing. )

Teacher: Let's enjoy the works of some children. (actual booth report)

Teacher: What is your model? What's next? (Show 3 works)

Teacher: The children below are all very beautiful. Please show your work to the teacher, and then turn it back for the teacher to enjoy.

Teacher: What a nice picture!

Step 2 put a sticker on it

Teacher: Big head son really likes you. Look, here he comes. Courseware playback: Thank you for coming to my birthday party, children. At the end of the party, I want to send a present to my mother. Can you help me? )

Teacher: Big-headed son is really sensible and considerate of his mother. In fact, our children's mothers, like apron mothers, do a lot of things for us every day and suffer a lot. As children, we must love our mother. Can we do that?

Teacher: Big head son gave his mother an apron. Please design regular patterns or lace with small flowers. Discuss in the group first, how to design. (Discuss the design scheme in the group)

Teacher: Please ask each group to complete the task according to the designed plan. (Teamwork, designing aprons)

(The teacher posted the designed apron on the blackboard while patrolling.)

Teacher: What a beautiful apron. Who can tell us how your group is designed? (Introduction by name)

Teacher: mother apron is so happy. She praises you for being the cleverest and most sensible!

Design Intention: Mr. Xia Gaizun, a famous educator in China, said: Education cannot be without affection and love, just like a pond cannot be without water. Let students design aprons with regular patterns or lace at the right time and go abroad with feelings, which not only consolidates new knowledge, improves students' ability to solve problems with mathematical knowledge, but also stimulates students' emotions and permeates gratitude education.

Five, contact life, appreciate the law

Teacher: Son, the birthday party is over. It's time to say goodbye to Big Head's son.

Tell me what you have gained from this class. (Answer by name)

Teacher: Actually, laws can be seen everywhere. Can you find out what other things are regular in our lives? (Answer by name)

Teacher: The teacher also collected some regular pictures. Please enjoy them. The courseware demonstrates pictures of spring, summer, autumn and winter, neon lights, traffic lights, sunrise and sunset. )

The teacher summed up: the law has brought us a wonderful enjoyment of life. As long as we observe attentively and use our brains more, we will certainly create more laws and make our world more colorful!

Design intention: to find and appreciate the rules in life, to closely link mathematics with life, and to provide a lively classroom for students.