1, half an hour on the hour, feel the benefits of effective use of time.
2. Have a preliminary understanding of the operation relationship between hours and half an hour.
You can dial hours and half an hour.
Teaching preparation: physics clock, children's learning clock, 8 teaching aid clocks, music.
Teaching difficulty: understanding a little.
Teaching emphasis: when you understand correctly, you will set the time.
Teaching process:
1. Introduce guessing games to stimulate children's interest.
Teacher: One thing is really strange. It can be said that it can walk without mouth and legs, and it doesn't shout tired when running day and night, reminding you that time must be cherished. Guess what, kids?
Health: clocks and watches
Teacher: The children are amazing. What clocks and watches have you seen?
Health: circle, rectangle, square, triangle, Mickey Mouse.
Teacher: Teacher Chen brought a round clock to the children today. Let's see what's on the watch, sir. (Play Ding's voice and display the clock)
Health: There are numbers, hands, circles and small squares.
Teacher: How many numbers are there? How are they arranged?
Health: There are 12, arranged from 1 to 12.
Teacher: What's the number directly above? What's the number directly below?
Health: The number directly above is 12, and the number directly below is 6.
Teacher: So when we take the clock, 12 is on the top and 6 is on the bottom, otherwise Mr. Zhong will be unhappy.
Teacher: How many hands are there? What are their characteristics? (Both hands of the clock are on 12)
Health: one is long and the other is short.
Teacher: We call Mr. Zhong's long legs minute hands and short legs hour hands.
Teacher: Do you know that the hour hand and the minute hand can walk?
Health: It goes in a circle, in the direction of numbers.
Teacher: The starting point of the hour hand and the minute hand is 12, pass the number1.2.3.4.5.6.7.8.910.1and then return to1.
Teacher: Now Mr. Zhong's long-legged minute hand and short-legged hour hand are going to have a race. Are at the beginning of 12. Guess who will win?
Student: The minute hand won. The minute hand ran around and the hour hand arrived at 1.
Teacher: It takes an hour for the minute hand to walk around and the hour hand to walk around.
Step 2 understand the whole point
Show it for four hours for children to observe.
2:004:008:009:00
Teacher: These are the clock faces for the whole hour. Do you know them?
Health: 2 o'clock, 4 o'clock, 8 o'clock and 9 o'clock.
Teacher: What did you find?
The minute hand points to 12, and the hour hand points to 2, 4, 8 and 9.
Teacher: The minute hand refers to 12 hour. What time is the hour hand?
The teacher leads the children to retell the concepts together and deepen their memories. )
Teacher: Let's read the whole point on the blackboard together.
Health: 2 o'clock sharp, 4 o'clock sharp, 8 o'clock sharp, 9 o'clock sharp.
Step 3 know a little
Teacher: Just now, Mr. Long Legs was tired from running for minutes, and he wanted to have a rest halfway. That's half an hour. (The teacher shows it for four and a half hours, please observe it.)
1:305:307:309:30
Teacher: These are all half-hour faces. Do you know them?
Health: .............., I don't know.
Teacher: What can you find?
Health: The minute hand of Mr. Long Leg is on 6, and the minute hand of the broken leg is between 1 and 2, between 5 and 6, between 7 and 8, and between 9 and 10.
Teacher: The minute hand points to 6, and whoever passes by the hour hand is 5: 30, which is 8: 30.
The teacher leads the children to retell the concepts together and deepen their memories. )
Teacher: Let's look at the clock face on the blackboard again.
Health: 1: 30, 5: 30, 7: 30, 9: 30.
In the game, children practice setting the clock.
Teacher: Xiyangyang Village is going to hold a "Happy and Healthy Catering Party". The village chief wants to invite children to attend, but he is afraid that the Wolf and Kotaro will mix together and disturb the order. The village chief set the password three times, and as long as the children matched the password, they said "open sesame".
You can go in. Now, the teacher quietly tells the children the password. Children set their own clocks. Don't let the wolf and them see it.
10:308:307:00
In children's surgery
Teacher: Just now, Director Yang Cun asked the teacher to show the password clock to the children and check their own, right? Children can also check each other.
Teacher: We dialed the password clock just now, but how did we dial it? Who can say how to dial a whole hour and a half hour?
Health: The minute hand points to 12, and the hour hand points to what time.
The minute hand points to 6, and the hour hand has passed a few minutes, and it has already passed half.
Teacher: One more thing, Yang Cunchang asked the children to help him. He wants the children to help him make an activity schedule for the sheep.
Teacher: Children can refer to their activities in kindergarten for one day.
Come to kindergarten at half past seven.
Have breakfast at eight o'clock
Take a walk after supper at half past eight.
Classes begin at nine.
do exercises
1 1: 30 lunch
12: 00 nap
Get up at three noon
3: 30 extracurricular activities
Leave the park at 5: 30 to get ready.
(Children operate by themselves according to the timetable, and teachers tour to guide)
Verb (abbreviation of verb) abstract
Teacher: Teacher Yang is very grateful to the children for making a timetable for the sheep. He will urge the sheep to strictly observe and cherish time, and tell the teacher to remind the children to use and cherish time effectively.
The children are observing the structure of the clock. Long legs are minute hands and short legs are hour hands. They are asking questions: "Why does the minute hand walk once and the hour hand only walk once?"
The child is doing the operation, and the child uses the homemade clock to dial the time at 8 o'clock sharp.
Children's homemade clocks, hour hand and minute hand not only have obvious length contrast, but also distinguish colors.
The child is checking his watch. He was thinking, "Did I set the right time?"
One-and-a-half-hour teaching plan for senior high school mathematics understanding II:
1. Guide children to learn to watch the hours and half hours of clocks, and try to explore its laws.
2. Cultivate children to learn to cherish time, observe time, and develop good habits of working and sleeping on time.
Highlights and difficulties of the activity:
Key points: learn to know the whole hour and half hour, and master its laws.
Difficulties: being able to know when to do something and learn to cherish time.
Activity preparation:
1. Material preparation: ppt photos of children's life in one day; Homemade clock card.
2. Experience preparation: Children have a certain understanding of the hour hand and the minute hand.
Activity flow:
Import activities
1. Music import: "Time is like a small carriage", please let the children in.
2. Hello, children! Today, Miss Wang brought a good friend to the children. This good friend believes that everyone has seen it in life. who is it?
(2) Graphic reading
1. Encourage children to observe the clock face and boldly say the characteristics of the clock face.
Teacher: "Look carefully, children. What did you find on the clock face? "
(Guide children to find that there are 12 numbers on a clock; Hour hand, minute hand and second hand and their characteristics. )
2. Help children remember the difference between the hour hand and the minute hand.
Teacher: "The children all find that there is a minute hand and an hour hand on the clock, so which is the minute hand and which is the hour hand?" What is the difference between them? "
(Guide children to tell the different characteristics of length and thickness)
(3) Understand the whole point of view
1. Feel the importance of time by showing some photos of children's daily life. Stimulate children's desire to explore.
Understand the whole point
(1) The teacher guides the children to know the whole hour through ppt.
(2) Teachers encourage children to try to explore the law of hours through various clocks.
Rule: The minute hand points to 12, and the hour hand points to what time.
Please have a try.
(1) Teachers use physical clocks to display various hours and ask children to actively participate and tell the time.
(2) Let the children set aside a whole hour as a small teacher at will and compete in groups to see who can tell the time first.
(4) Know a little
1. Teachers guide children to observe the difference between half-hour clock and small clock, and encourage children to try to explore the law of half an hour.
Teacher: "We have just known for a whole hour. What's the difference between the minute hand of this clock and that just now, children? " (Guide the child to say that the minute hand points to 6)
2. Help the children tidy up: at 1: 30, when the hour hand points to the middle of two numbers, count the numbers when they are small.
Rule: When the minute hand points to 6 and the hour hand points to a few, it is 5: 30.
Please have a try.
(1) The teacher shows all kinds of half hours with a physical clock, asking the children to actively participate and tell the time.
(2) Let the children set aside half a point as a small teacher at will and compete in groups to see who can tell the time first.
(5) Review and arrangement
Team game: Please come and help.
Teacher: "What are the children doing these days? Teacher Wang is a little confused. Please help me quickly! "
1. Teachers show the time separately and discuss in groups.
2. Share the results in groups. Encourage children to boldly use mathematical experience to solve problems in life.
3. The teacher summed up the importance of helping children understand the clock; Cultivate children to learn to cherish time, observe time, and develop good habits of working and sleeping on time.
Activity reflection:
The origin and reality of mathematics exist in reality and are applied to reality. Mathematical process should be a process to help children turn practical problems into mathematical problems. The content selection of educational activities should be close to children's life, and choosing things and problems that children are interested in will help expand children's experience and vision. Make full use of the resources in children's real life, and have a substantial impact on children through the activities acting on them, so that children can feel the quantitative relationship of things in life and games, and experience the importance and interest of mathematics.
Teaching plan 3 of "understanding for an hour and a half", the goal of big class mathematics activities;
1. On the basis of recalling the existing experience, children can understand the running relationship of the second hand, the minute hand and the hour hand by observing and operating the clock face.
2. Understand the reading and recording methods of the hour, half an hour and half an hour.
3. Induce children to form a good habit of observing time and cherishing time in activities.
Activity preparation:
1, teaching aid: slides about various clocks and watches; On one side of the clock, a movable clock face; At 7 o'clock, 8 o'clock, 9 o'clock and 10 o'clock, there is a clock face and a time record card.
2. Learning tools: one for each child's observation record and one for each active clock face; 4 physical clocks.
Activity flow:
First of all, mobilize existing experience and recall relevant knowledge.
1, some time ago, our children and teachers made a survey about clocks and watches together. We know there are many kinds of clocks and watches. Now please look at the clock downloaded by the teacher from the internet and see if you know it.
2. Play the slides in turn and tell the children their names.
What we just saw is only a part of the Zhong family. There may be other types, which we will discuss later.
Last time we knew the clock face, we told you that the longest hand is called the second hand, the slightly longer one is called the minute hand, and the shortest one is called the hour hand. How many numbers are there on a clock face (12)? The top number is 12, followed by 1, 2... 1 1. Please remember which direction the hands of the clock are going. (1 ... 12) Yes, this direction is called clockwise.
Second, exchange questionnaires and tell me when and what you are doing.
1. The children spoke very well. Do you know why we use clocks?
Clock is closely related to our life. A few days ago, our children made a survey and recorded the time of their activities. Now, please take out your own questionnaire and tell us what you were doing. Just tell me where the long needle is, when the short needle is and what are you doing? Okay, let's start with ourselves.
3. Who wants to come up and tell everyone? Please bring 3-4 children up.
This is a good point. The hands on the clock face are constantly changing. What is their operational relationship?
The teacher has prepared several clocks for you. Look at how many hands there are. (2) Can you guess which two hands they are? (Minute hand and hour hand), where is the second hand? Listen (tick) that the second hand is running. What is their relationship at runtime? Let's invite our children to play and see what secrets they have. Note that when you dial the pointer, you must dial it clockwise.
6. Tell me, what did you find? That's good. The minute hand turns once and the hour hand moves one square, which means one hour.
7. What time do the numbers pointed to by the long needle and the short needle indicate? Don't worry, the teacher will introduce you.
Third, understand the whole hour, half hour and their recording methods.
1, ok, please listen to a good story first.
2. The teacher tells the story of "Xiaoming's Autumn Tour" with an expression, and shows the clock face of the relevant time while talking.
Teacher: Today, the teacher brought some photos of children living in kindergarten. Let's have a look!
1. What are the children doing? When do you have breakfast? Children, take out the clock face under your chair and dial it!
2. What are the children doing? When is the class? Children, dial it!
3. What are the children doing? When do you go to bed? Child operations.
4. What are the children doing? When do you get up? Child operations.
5. What are the children doing? When is the outdoor activity in the afternoon? Child operations.
6. What are the children doing? When do you leave the park? Child operations.
Five, the game operation:
1. The teacher demonstrates computer games and asks each child to operate them.
Teacher: Today, the teacher also brought a fun clock game to the children. Look! When the clown tells the time, the children can press the arrow on the bell ear, turn to the position you think is correct, and then click OK below, and the clown will make a correct or wrong judgment.
2, children's chorus songs, computer operation.
Children, do you want to play this game? So before we go to the computer room together, shall we sing a song about the computer room?
Teaching plan 4 of "understanding for one and a half hours" in big class mathematics;
1. Know that there are hours and minutes and 12 numbers on the clock face.
2. Know that the minute hand walks a circle, the hour hand walks a number, the hour hand walks half, and the minute hand walks half, knowing the whole hour and a half.
3. I am interested in understanding clock activities and like to participate.
Teaching focus:
Know the clock face, know the meaning of the minute hand walking a circle and a half, and know the hour and a half.
Teaching difficulties:
Know about it.
Teaching preparation:
One big clock, eight Jason Chung.
Teaching process:
1. Dialogue: It's 7 o'clock. It is time for the teacher to get up. How do I know 7 o'clock? Show me the clock. It points to 7 o'clock.
2. The teacher explains the clock face, and the number 12 represents the hour. The relationship between the hour hand and the minute hand: the hour hand has short legs and walks slowly, while the minute hand has long legs and walks fast. The minute hand makes a circle, and the hour hand takes a number, which is the hour. The teacher set aside time for the children to read.
When the minute hand is halfway, the hour hand is halfway. Let the children talk about where the minute and hour hands are. Emphasize it several times to make the child understand half the meaning, that is, half the meaning. Practice more and consolidate a little reading.
Look at the clock in pairs, the teacher reads the numbers, and the children dial the time. The key is to dial half an hour.
5. Two children cooperate, one person sets aside time for one child to read, and then exchange.
6. Teacher's brief summary: The whole hour means that the minute hand walks a circle and the hour hand walks a number. Half an hour means that the minute hand walks half and the hour hand walks half.
7. End.