The goal of "Countdown" 1, an excellent math teaching plan for large classes;
1. Understand the meaning of countdown and be interested in the method of countdown.
2. Experience the relationship between countdown and our life.
3. Understand the application of numbers in daily life, and preliminarily understand the relationship between numbers and people's lives.
4. Experience the life of mathematics and the fun of mathematics games.
Activity preparation:
Related ppt, big calendar, each group of pens.
Activity flow:
First, import
Display "countdown": "Do you know what countdown is?"
Summary: Countdown is to count the time backwards, which is called countdown.
Second, look for the countdown to life.
Question: Where have you usually seen countdown?
1) child: electric fan.
Teacher: A Let's see where the countdown on the electric fan is.
Do you usually use the countdown on the electric fan?
Who used it? (Mom, children)
Why does mom use the countdown on the electric fan?
Child: Mom starts the countdown. I don't catch a cold when I fall asleep.
Teacher: Mom really cares about our children. By the way, falling asleep after the electric fan is set for countdown can prevent us from catching cold. With the countdown, we can protect our health.
Child: Save electricity. Why do you save electricity? )
Teacher: Yes, now we advocate a low-carbon life. We should save water and electricity. With the countdown timer, the electric fan will automatically turn off after we fall asleep, saving more electricity.
Summary: Through the countdown on the electric fan, we can turn off the electric fan when the children are asleep, prevent us from catching cold, save electricity and realize a low-carbon life. The countdown is really useful!
2) children: microwave oven
Teacher: Did you see what was written on the timer on the microwave oven? Time varies, such as one minute, two minutes, 30 minutes.
Teacher: Why do you have different times? (Is there a countdown in the home appliance industry? )
Conclusion: We can determine different times according to different foods, which not only ensures that the food will not be burnt, but also can do other things without our supervision, which is both safe and convenient.
3) Rocket Launch: Today, the teacher brought a short video of rocket launch. Shall we go and have a look? (Watch the video)
How to pronounce the final countdown to rocket launch? When the rocket is launched, we must count down to ten seconds. )
B Why did you count down a few seconds before the rocket was launched? Let's get ready together. Everyone is very excited and looking forward to this moment.
Teacher: The rocket launch needs many scientists' uncles and aunts to do a lot of preparatory work to ensure the success of the rocket launch. With the countdown, they can listen to the unified password and make preparations together.
Teacher: By the way, our rocket from China is about to go into space. Everyone in China is very excited and looking forward to this moment.
Summary: By the way, the countdown before the rocket launch reminds us that the uncles and aunts of scientists should concentrate together and make final preparations. At the same time, let all of us in China remember this important moment, and remember that we are really great in China.
4) traffic lights
What does the countdown to the traffic lights tell us?
Summary: The numbers on the green light tell us that the longer the crossing time is, the safer it is, and the shorter the crossing time is, the more dangerous it is. With the countdown, it is safer and more convenient for us to cross the road.
5) advertising countdown
What TV program do you watch with an advertising countdown? Why is there an advertising countdown? I know how long I have to wait. I'm not in a hurry. Please tell me if it's too late to go to the bathroom. )
Summary: With the countdown to advertising, you can know the waiting time, so you won't be in a hurry.
Conclusion: Countdown is used in many places in our lives. Some countdown uses "seconds" (rocket advertisements, New Year bells), some countdown uses "minutes" (fans, microwave ovens, electric blankets), and some countdown uses "days". Different places have different uses. Countdown has a lot to do with our life.
Transition: Do you want to count down? What do you want to do in countdown?
Third, try to calculate the countdown.
1, exchange and discuss the countdown method.
2. Stimulate children's desire to count down.
June 1 is coming soon. Let's make a countdown card together.
Find out what festivals are there in June.
Question: What's the date today? What date should we find besides today's date?
3, children's operation, teachers observe children to take the countdown method.
4. Exchange questions: June 1 A few days ago? How to calculate it?
(1, countdown 2, countdown 3, two numbers,
5. One month plus extra days-is a month 30 days?
6. Why is the difference between days one day? June 1 doesn't count. Why can't it count)
7. Summary: With the countdown to June 1 day, we can clearly know that today is 6. 1 interval has a few days to count down, so you can get ready during this period.
8、6。 5 World Environment Day countdown.
9. Lead out the countdown to leaving the park and let the children do the countdown to leaving the park.
The goal of the excellent math teaching plan "Countdown 2" in the big class;
1. Understand the meaning of countdown and be interested in the method of countdown.
2. Experience the relationship between countdown and our life.
Activity preparation:
PPT courseware, rocket launching video, big calendar, each group of pens.
Supporting courseware: PPT courseware for big class mathematics courseware "Countdown"
Activity flow:
First, import.
PPT demo countdown: "Do you know what countdown is?"
Summary: Countdown is to count the time backwards, which is called countdown.
Second, look for the countdown to life.
Question: Where have you usually seen countdown?
(1) Illustration: electric fan.
Teacher: A Let's see where the countdown on the electric fan is.
Do you usually use the countdown on the electric fan?
Who used it? (Mom, children)
Why does mom use the countdown on the electric fan?
Mom sets the countdown. Don't catch a cold after sleeping.
Teacher: Mom really cares about our children. By the way, falling asleep after the electric fan is set for countdown can prevent us from catching cold. With the countdown, we can protect our health.
Yang: Save electricity. Why do you save electricity? )
Teacher: By the way, now we advocate a low-carbon life and save water and electricity. With the countdown timer, the electric fan will automatically turn off after we fall asleep, saving more electricity.
Summary: Through the countdown on the electric fan, we can turn off the electric fan when the children are asleep, prevent us from catching cold, save electricity and realize a low-carbon life. The countdown is really useful!
Teacher: The rocket launch needs a lot of preparations from many scientists, uncles and aunts to ensure the success of the rocket launch. With the countdown, they can listen to the unified password and make preparations together.
Teacher: By the way, our rocket from China is about to go into space. Everyone in China is very excited and looking forward to this moment.
Summary: By the way, the countdown before the rocket launch reminds us that the uncles and aunts of scientists should concentrate together and make final preparations. At the same time, let all of us in China remember this important moment, and remember that we are really great in China.
(4) Show pictures: traffic lights
What does the countdown to the traffic lights tell us?
Summary: The numbers on the green light tell us that the longer the crossing time is, the safer it is, and the shorter the crossing time is, the more dangerous it is. With the countdown, it is safer and more convenient for us to cross the road.
(5) Show pictures: countdown advertisements
What TV program do you watch with an advertising countdown? Why is there an advertising countdown? I know how long I have to wait. I'm not in a hurry. Please tell me if it's too late to go to the bathroom. )
Summary: With the countdown to advertising, you can know the waiting time, so you won't be in a hurry.
Conclusion: Countdown is used in many places in our lives. Some countdown uses "seconds" (rocket launch, New Year bell), some countdown uses "minutes" (electric fan, microwave oven, oven), and some countdown uses "days". Different places have different uses. Countdown has a lot to do with our life.
Transition: Do you want to count down? What do you want to do in countdown?
Third, try to design the countdown.
1, exchange and discuss the countdown method.
2. Stimulate children's desire to count down.
June 1 is coming soon. Let's make a countdown card together.
Find out what festivals are there in June.
Question: What's the date today? What date should we find besides today's date?
3, children's operation, teachers observe children to take the countdown method.
4. Exchange questions: June 1 A few days ago? How to calculate it?
(1, reciprocal 2, reciprocal 3, two numbers)
5. One month plus extra days-is a month 30 days?
6. Why is the difference between days one day? June 1 doesn't count. Why not?
7. Summary: With the countdown to June 1 day, we can clearly know that there are still several countdown days from today to June1,so we can make preparations during this period.
World Environment Day, 8, 6.5.
9. Lead out the countdown to leaving the park and let the children do the countdown to leaving the park.