Tisch
The teaching goal of the lesson plan "Little Bear Opens a Shop";
1, get a preliminary understanding of the close relationship between division and life century.
2. Learn to use multiplication formula to find quotient from 2 to 5, so that students can feel the simplicity of multiplication and division.
3. Understand the reciprocal relationship of multiplication and division.
Some simple practical problems can be solved by division.
Teaching emphasis: establishing the mathematical model of "seeking quotient by multiplication formula"
Teaching difficulties: expand the understanding, understanding and application space of the meaning of division.
Teaching preparation: courseware and teaching AIDS.
Teaching process:
First, scenario creation.
Teacher: What sound did you hear just now?
Health: The sound of firecrackers.
Teacher: By the way, the sleepy bear got up early today, so that's it! Bear's shop opened today, and his good friends Little Monkey and Little Tiger also came to congratulate him on the opening of his new shop. do you want to see it ? Yes Then let's have a look, shall we?
The computer shows the theme of the courseware, and the blackboard says: Bear opens a shop.
Bell invited us in. Let's see what's in the small shop. The child told us (the computer shows the theme map of the textbook)
Please watch carefully and see what mathematical information you have received. Talk to your deskmate.
Second, the problem exploration
The little monkey wants to buy four tanks for his cousin, good friend and himself, but the little monkey can't figure out how much to pay. This time, the bear was stumped. Children, would you like to help this bear?
1, calculate: How much does it cost to buy four tanks?
1) think independently
2) Independent formulation
3) Exchange reports
4) Statement: 4×5=20 (yuan) or 5×4=20.
How many tanks can I buy for 2.20 yuan?
1) think independently
2) Independent formulation
3) Exchange reports
4) Report: 20÷5=4
3. In-depth discussion: How to calculate 20÷5?
Think independently and report personally.
Both the little monkey and the puppy bought tanks. They are very happy. Are you happy? Now the teacher will test you, 4*5=? What do you find in 20/4=5?
Third, experience sentiment.
1, teacher's question
Now the teacher has a problem. It depends on everyone. I have 12 yuan. If I want to buy a pencil box, how many can I buy? Buy a ball?
1) Think independently and calculate 2) Student feedback
3) Write the answer in the book.
4) Solve the problem of "What did you buy? Did you run out of 24 yuan?"
Guide students to say their own ideas.
2. Students' problems
Interactive activities: Ask and answer questions in groups and talk about the formulas used.
Fourth, practical application.
1, give it a try (to remind everyone to calculate while thinking about the formula)
1) Try independently 2) Communicate and talk about the formula used.
Step 2 practice for a while
The bird has gone home.
Show the pictures of the questions and guide the students to look at the pictures.
Complete independently, communicate collectively, and modify.
2) ants move
Show the pictures of the questions and guide the students to look at the pictures.
Complete independently, communicate collectively, and modify. Tell me the formula used.
3) Animals can move
Show the pictures of the questions and guide the students to look at the pictures.
Complete independently, communicate collectively, and modify. Look, that team runs fast!
Verb (abbreviation of verb) abstract
Distribution of intransitive verbs
Classroom exercise book
extreme
The teaching goal of "dividing bananas" in the teaching plan;
1, combined with the specific situation and experience of average score, abstract the division formula and realize the significance of division operation.
2. Master the reading and writing of the division formula and know the names of each part of the division formula.
3, will use the division formula to express and explain the specific process of the average.
Teaching emphasis: understand the process of equal division, understand the reading method of division formula and the names of each part.
Difficulties in teaching: establish the connection between division formula and bisection formula in a specific environment to deepen the experience.
Teaching preparation: theme map.
Teaching process:
First, scenario creation.
1. Do you know what little monkeys like to eat? Show pictures and wall charts of wise old people.
Who can explain the meaning of this picture to everyone?
Write on the blackboard.
Second, the problem exploration
1. What math questions do the students want to ask when they look at the picture?
Divide 12 banana into two equal parts. How much is each?
Students get one point by representing bananas with sticks.
Dialogue: Divide 12 banana into two parts, and we can calculate by division. The operation symbol of division is read as: divide by.
How is 12 divided into two parts? Why is it equal to 6?
If 12 is divided into three parts, can it be expressed by division? )
3. Explain the names of the parts in the division formula.
Third, experience sentiment.
Show the wooden stick picture of 18, and let the students score one point by themselves, which is expressed by the division formula.
Organize students to report and tell the meaning of the formula.
Fourth, practical application.
Complete exercise 2, questions 1, 2, 3, ask students to complete independently, and teachers will patrol collectively to correct them.
Verb (abbreviation of verb) abstract
Do you like this course? Can you tell me something about your harvest?
Distribution of intransitive verbs
Classroom exercise book
Tisso
The teaching goal of "dividing candy" teaching plan;
1. Cultivate students' hands-on operation ability and preliminary abstract generalization ability through a little activity. Let the students further understand the meaning of division according to the specific situation.
2. Enable students to solve some simple practical problems through division, and initially experience the close relationship between division operation and real life. And let students learn to affirm themselves and listen to others' opinions in the study of cooperation and exchange.
Teaching Emphasis: Understanding the Meaning of Division
Teaching difficulties: using division to solve some simple practical problems
Teaching preparation: a cup of soybeans
Teaching process:
First, scenario creation.
First, attend the birthday party to arouse the consciousness of the "protagonist".
As soon as the class started, I asked the students, "Children, do you know what special day today is?"
Then, I mysteriously told them: "Today is the teacher's birthday!" " "Then he said," I bought a lot of delicious food and want to invite the children in our class to my birthday party, ok? "
When they quieted down a little, I said awkwardly, "But the teacher is too busy today. Can you help the teacher? " The teacher will set the table six times. Can you help me divide these delicious things (the number of these snacks appearing on TV at the same time: 42 oranges, 34 jellies, 95 peanuts, 100 candy, 49 chestnuts and 72 biscuits) into six portions on average? "Show the topic" Divide the food ".Then, I let their group freely choose what they want to help the teacher divide, and the group leader went to the podium to collect the items to be divided.
Second, the problem exploration
1, hands-on practice, independent exploration.
Let the students discuss in groups how to divide the things in their hands into six parts equally, and then let a child divide them. The team leader will make a record to see which part is done well and quickly.
Students begin to discuss in groups, and then divide them. After dividing, communicate with the whole class.
2, the whole class communication
Let each team leader report the division of the group and explain why it is divided like this. It is necessary to encourage students to diversify their views and evaluate which group does better.
Third, experience sentiment.
Narrator: Everyone noticed that there were soybeans on every table. Isn't that a little strange? There is a custom in our hometown: we should eat soybeans on our birthday. So I prepared soybeans for everyone. Before eating soybeans, I'll play a game with you with soybeans, okay?
Before playing the game, explain the rules of the game to the students: send a child in the group to catch a handful of soybeans and divide them. If it can be divided into two parts on average, get 2 points; If it can be divided into 3 parts, get 3 points again; If you can divide it into 4 parts on average, you will get 4 points; If you keep dividing it, you will get more points if you can divide it into several parts; See which group scores.
Students begin their activities. When finished, enter their scores in the prepared form and present them on TV. After all, let the students judge which group wins according to the score, and then reward the winning group.
Fourth, practical application.
Verb (abbreviation of verb) abstract
Narrator: Did you have a good time at the teacher's birthday party?
Then guide the students to sum up by themselves: What did you learn today? How did you learn it?
Distribution of intransitive verbs
Classroom exercise book