Teaching content: page 8 1 to page 83 of the second volume of primary school mathematics by People's Education Press.
First, the scene is introduced.
Children, which cartoons do you like best? (Blue Cat, Teletubby)
I also like watching blue cats. When does it play on TV every night? How do you say 8 o'clock on the clock?
Second, know the clock face.
This is a clock face, which needle is the hour hand and which needle is the minute hand, do you remember? Who will say something?
What else is on the clock face? (1-12, 12 number) This12 number divides the clock face into many large squares. How many big squares are there in a * *?
There is a cubicle in the big cubicle, see? We will study it carefully in the future.
Who will dial 8 o'clock with this clock now? Right? how do you know
What's after the blue cat broadcast? (Teletubby) What time is it? (8: 15)
We watch Teletubbies at 8: 15 in the evening. 8: 00 am15 what are we doing? Now the clock face is
8 o'clock, 8 o'clock 15 How many minutes left? 8: 15 Who will distribute it? Note: the minute hand moves one square for one minute. Let's count down 1, 2, 3,. . . 15。 Now the hour hand has passed for a few minutes, and the minute hand has gone three squares. How many minutes have passed? It's 8: 00 15. Watch it again.
It takes a few minutes for the minute hand to walk a small square. Feel it. This piece of music just now was exactly one minute. The minute hand passed a Little Square. 2 squares, 20 squares, 30 squares? It's too much trouble to count one grid at a time. What else can you be? (Five digits: 5, 10, 15,-) Can you count down? Open page 8 1 of the book and fill in the numerical results.
How many squares are there on the clock face and how many points are there when the minute hand goes once? As long as you can count the squares on the clock face, you can quickly know the time.
Third, know the time.
1, showing the clock face at 9: 05.
What time is it now? How did you know? Write 9: 05 on the electronic clock at 9: 05. Because the minute hand only walked for 5 minutes and did not exceed 10, the number representing 10 minutes was represented by 0. So write it as 9: 05.
2. Display the clock face at 6: 25.
Can you write? -Hours-minutes
How to express electronic clock —————
3. Write more.
Finish page 82 and do the first question.
There are still some clock faces in the computer. Do you know them?
4. Display the clock face of 4: 15 minutes.
What time is it now? The minute hand points to 3 more easily. The clock shows 9: 15 minutes. If the minute hand just points to the small box, will you recognize it? How to count squares? (5, 10, 15, take another square, 16, 17, 18, 19) The children are so careful that they even count the squares. Can you identify these clock faces carefully?
5. Complete page 82 and do the second question. You are so clever. There is still a lot of knowledge on the clock face. Do you want to know?
Fourth, explore the relationship.
Let's set the clock face together and let the minute hand walk for 30 minutes. Is the hour hand from 12 to 1? In less than an hour, we were only halfway there. What time is it now? (Courseware demonstration) Dial down again, 35,40-55,60. How many points does the minute hand pass at a time? (60 points)
How far is the hour hand from 12? After a big step, it is 1. Do you know the relationship between 1 and 60 points? Blackboard: 1 hour =60 points
Let's take a look again (courseware demonstration)
Verb (abbreviation for verb) consolidation exercise
1. Today, we learned a lot about clocks. Now we use this knowledge to play a game to help small animals make friends with computers.
2. Complete the first question in exercise 15.