1. Understand the surface structure of clocks and learn to watch the hours.
2. Develop children's logical thinking ability.
3. Educate children to cherish time and develop good habits of working and sleeping on time.
Focus. Understand the surface structure of clocks and watches, and learn to watch the hour.
Difficulty: I can see the whole point correctly.
Teaching preparation:
A physical wall clock model, courseware.
Teaching process:
Teacher: Before class, I will tell you a riddle. You should listen to it: "You can say that you can walk without mouth and legs. It can tell me when to get up and when to go to bed." A three-legged horse runs day and night and doesn't shout tired. Tick tock reminds you that time must be cherished.
Student: Clock.
First, the teacher shows the wall clock.
1. Question: What's its name? What other clocks and watches have you seen? Some people make the clock very small and call it a watch for the convenience of wearing it on their hands.
2. What is the function of the clock? The clock keeps moving, showing people the time, and people work, study and rest according to the time on the clock.
Please look at what's on the clock. (There is a number 1- 12 with two needles.) The teacher explained that the number "12" on the clock is always above and "6" is always below.
It turns out that the clock is surrounded by numbers from 1 to 12. See how they are arranged.
Student: Circles arranged in sequence.
Teacher: What's the number directly above?
Student: 12
Teacher: What's the difference between these two kinds of needles?
Student: One is long and the other is short.
Teacher: Actually, everyone has a nice name. The long hand is called the minute hand and the short hand is called the hour hand. The teacher pointed to the long and short hands and taught the children to read the hour hand and the minute hand respectively. Repeat several times
Teacher: Please look in which direction these two needles are pointing. (The teacher rings the bell)
Student: 1 to 12.
Teacher: Yes, this direction is called clockwise. Brother, the needle turns clockwise. Do children know what rules Brother Needle runs?
Second, the hour hand and minute hand race to guide students to perceive the movement law of the hour hand and minute hand.
Teacher: The hour hand and the minute hand are going to run today, and now they are all at the starting line of the number 12. Please guess who will win? Ok, the game is about to start, ready-go! Ask the students to pay attention to what happened to the short hand (the hour hand walked a big grid, or a number, and the minute hand ran a circle. ) The teacher dials a few times to make the students understand that every time the long hand (minute hand) goes around, the short hand (hour hand) goes one grid, which is one hour.
Teacher: Who runs fast?
Student: Minute hand
Teacher: Please take a good look at the minute hand and the hour hand. What's the secret between them? Teachers' repeated operations
Teacher: So! The minute hand walks once and the hour hand walks one grid, which means one hour. Teaching children's songs: the hour hand is short, the minute hand is long, the hour hand walks one grid, and the minute hand runs one lap.