Understanding of 1 teaching content in the teaching design of clocks and watches;
The first volume of experimental teaching material, No.91~ 95, knows clocks and watches.
Teaching objectives:
1, knowledge point: know the clock through observation and your own attempt; Understand the relationship between hour hand and minute hand; The hour hand moves one square and the minute hand moves one circle. ) master the meaning of time; Understand the law of the hands on the surface of the hour hand.
2. Training point: cultivate observation, thinking, hands-on ability and bold attempt spirit; Be familiar with the time displayed on the clock face.
3. Innovation: Infiltrate education that cherishes time and experience the connection between mathematics and life; Understand the use of clock in combination with daily life.
Teaching focus:
Skilled time identification; Experience the connection between life and mathematics.
Teaching difficulties:
The regularity of the surface of an hour hand and a half hour hand.
Teaching environment design:
1, each hand has a small clock that can be dialed.
2, reflect the daily life schedule of students (get up, go to school, lunch, nap, etc.). ), clock evolution diagram.
3. An animation courseware and a teaching aid clock model.
Teaching process:
First, create an attempt situation, stimulate the desire to try and reveal the topic.
1, Introduction: Do you like watching cartoons, children? Please look at the big screen.
2. Play the animation of rooster crowing. Guess what people do when the rooster crows.
3. Reveal the theme: The cock crows can tell people the time, what else can tell us the time? Clocks and watches can tell us the time. In this lesson, let's "know clocks" together.
Second, understand the independent activities of the clock face.
1. Organize groups to play clocks and put forward observation tasks.
(1) Give each group a clock to play with. (The clock face only has scale, hour hand, minute hand and second hand)
(2) Requirements: Can you see what is on the clock face when you play? Press the button behind the clock again and see what you find. Let's start playing
2. Students play clocks by themselves and communicate in groups.
3. The group reported the observation results when the bell rang.
(1) The children were playing with the clock just now. What did you find?
(2) Can you show it to everyone? (Students show themselves)
4. Summary: We found three needles, which are children playing with clocks. Short and thick hour hand, tell me: hour hand. The longer minute hand, say it once: minute hand. There is also a thin and long second hand. When you push the button behind the clock, you will also find that the hour hand on the clock face moves slowly and the minute hand moves fast.
5, consolidate the clock face: really capable! The pointer says the name.
Third, the whole process of teaching
1, clock face is different: change a clock with the number 12.
Compared with the clock face just now, what is more in this clock face? Yes, there is a number 12 on this clock face. They are used to record scales.
2. Know the time on the physical clock face.
The clock goes from 12 to 1. Q: What did you find? The hour hand moves one grid, and the minute hand moves one circle. It's better to say it, but it doesn't matter if you can't. Do you know the time indicated by the clock face? The clock goes from 1 to 2 o'clock. What time does the clock show?
3. Show three model clock faces to understand the whole time.
Analysis on the textbook Understanding the Teaching Design of Clocks and Watches II:
The content of this lesson is pages 84-85 of the first grade of primary school mathematics published by People's Education Press. This lesson mainly talks about students' understanding of the scene theme of the hour and the hour on the clock face, so that students can know the hour hand and the minute hand first, and then the hour on the surface of clocks (including electronic watches). Let the students learn to observe the whole time according to their own lives and understand the hour hand and minute hand on the clock face.
To preach the law:
The teaching object of this class is first-year students. They are young, active, playful and curious, so they are prone to fatigue and distraction in forty minutes of teaching. According to this feature, in order to seize their interest and stimulate their curiosity, I adopted pleasant teaching methods, created situations and designed colorful courseware, which enabled students to learn in the situation created by courseware, stimulated their cognitive interest and gave full play to their learning enthusiasm.
In order to better highlight students' dominant position, in the whole teaching process, students are encouraged to actively move their eyes, ears, brain and mouth through thinking, counting, speaking, comparing, writing and dialing, and are guided to learn new knowledge through their own learning experience, so as to actively carry out teaching activities in this class.
Teaching objectives
1. Through observation and operation, let students know the clock face, know the whole time on the clock face and establish a preliminary concept of time.
2. Cultivate students' preliminary observation ability, hands-on ability, generalization ability and cooperation consciousness in learning activities such as knowing the hour hand, minute hand and setting specific moments.
3. Let the students understand the close relationship between mathematics and life, express the time problem in life with time and approximate time, and cultivate the preliminary mathematics application consciousness.
Emphasis and difficulty in teaching
Teaching emphasis: the whole reading method.
Teaching difficulties: initially establish the concept of time, and look at the time on the clock.
Prepare teaching AIDS and learning tools
Media courseware, clock face model with hour hand and minute hand, model without minute hand and hour hand.
Learning tools: everyone should prepare a learning tool clock that can be dialed.
teaching process
First, guess imports, stimulate interest
1, children, the chicken crowed, the bird crowed and the sun came out. Pleasant goat and lazy goat are going to get up and go to school, but Pleasant goat is going to go to school early and wants to ask lazy goat to go with them, but lazy goat is still in bed and doesn't want to get up. In this way, lazy sheep are always late for class. Children, do you have any good ways to keep lazy sheep from being late for class?
2. The child is really smart! Yes, we can give lazy sheep a gift, but what is this gift? This is a clock.
There are many brothers and sisters in the watch kingdom. Do you want to go to watch world? The courseware shows all kinds of clocks and watches.
Do you like these clocks? Then let's make friends with them now. (blackboard writing topic)
5. What have you learned about clocks and watches? What other knowledge about clocks do you want to exchange with your friends? (Students casually say)
Design intention: Draw the clocks and watches to be learned in this class through the animated characters that the first-year students like, so as to stimulate students' interest in learning and arouse their enthusiasm for learning. Various clocks and watches are played in music, which broadens students' understanding of various clocks and watches. )
Second, with the help of experience, understand the clock face.
(a) know the clock face:
1, Teacher: Please close your eyes. Teachers will change. Open your eyes. This is the surface of the clock. Look carefully. What's on the clock face? (Students communicate in groups)
2, exchange report: (according to the students' answers, the teacher randomly guides)
(1) There are numbers on the dial.
Guide: Please point to the numbers on your school clock and read them together in the order from small to large.
(2) There is a needle on the clock face.
How many needles are there on your clock? How many needles are there on the teacher's clock?
Guide: Compare these two needles.
Voice-over: My body is long, my name is minute hand, my body is short, and my name is hour hand.
Who will point out which is the minute hand and which is the hour hand on this clock face (deskmates point to each other on the school clock)
Which direction does this needle point? Let's draw a picture.
Note: the hour hand and the minute hand move in the same direction.
(3) There are 12 cells, and each cell has five cells.
(Design intention: According to the students' answers, we will randomly guide the feedback on the clock face, taking students as the main body, so that students can understand the clock face and lay the foundation for later learning. )
Third, participate independently and explore new knowledge.
1, (The courseware shows 84 pages of scene map) Please look at this picture. Who can tell me what time it is? What are the people doing in the picture?
The student said: It's 7 o'clock in the morning, and the mother is waking up the child.
Teacher: Is this scene familiar? Do you do this every day? We should form the good habit of going to bed early and getting up early.
Teacher's guidance: 7 o'clock is 7 o'clock in writing.
Teacher: Who can tell us what the hour hand and the minute hand mean at 7 o'clock?
The hour hand points to 7 and the minute hand points to 12.
Teacher: You are really an observant boy.
In order to praise you, the teacher gave you a ticket to the playground and asked you to take us with you! Let's play together.
Teacher: The opening hours of this playground are limited. Let's take a look at the opening hours of these games first.
Teacher: Who knows the departure time of the roller coaster?
(health: eight o'clock, eight o'clock, eight o'clock sharp, etc. )
Teacher: Just now you said 8 o'clock, 8 o'clock and 8 o'clock sharp. These are expressions in daily life. Mathematically speaking, it's exactly eight o'clock. (Blackboard: 8 o'clock) Who will say?
Let some students say "eight o'clock"
Teacher: Who knows when the pirate ship will leave?
(Health: 3 o'clock) (Blackboard: 3 o'clock)
Please read the whole class three times.
Teacher: Let's see when Happy Paradise began.
Students speak individually and the whole class speaks.
3. You are so clever! I can already tell the time. Now, please observe these three clock faces carefully. What did you find? Do these three clock faces have anything in common? Students observe and talk to each other at the same table.
The teacher summed up: like this, the minute hand points to 12, which is all the time. (written on the blackboard: exactly) What time is it? We will continue to look at the hour hand and what time it points to.
(Design intention: let mathematics approach the reality of life, let life enter the mathematics classroom, encourage students to collect information in life experience, experience the existence of mathematics in life, understand the role of mathematics and experience the fun of mathematics. )
Fourth, practical application and consolidation of new knowledge.
Teacher: The students already know the clock face just now. Now let's play a game of finding friends!
(1) The screen shows Apple Clock: "Where is my friend?" (The clock is pointing to 2 o'clock)
Student: Your friend is here (at the same time as setting the school clock).
Show the kitten clock and puppy clock in the same way as above.
(2) Group practice of setting the clock: one person says the time, and the other three practice setting the clock and check each other.
Design intention: through different levels of practice, consolidate the understanding of the whole time on the clock face and let students master knowledge in the activities. )
(3) time characterization
Teacher: The students really didn't let the teacher down. Now, the teacher has brought you a good friend-Xiaoming. Do you welcome him? Let's walk into Xiao Ming's life and see what he is doing at any time of the day (showing courseware).
We know Xiao Ming's daily schedule, so how can we write down his schedule?
Summary: We saw Xiaoming brushing his teeth at 7 o'clock. We can deliver it by 7 o'clock. It can also be expressed by 7 o'clock. Then the first method is the ordinary timing method, that is, writing a "time" after the number, and the second method is the electronic timing method, that is, writing the number on the left, two points in the middle and two "0s" on the right.
2. There are two ways of writing: students write books and teachers patrol and guide them.
(design intent: practice writing time. In these activities, I let students "do math" by themselves, feedback and communicate in time, and link operation with thinking, so that operation becomes the source of cultivating students' innovative consciousness. )
3, roll call feedback, get up at 7 o'clock; Reading at 9 o'clock; Break at 10. 12 have lunch, watch cartoons at 6 o'clock and go to bed at 9 o'clock. (big screen demonstration)
4. Teacher: Hey, the teacher has a small problem that needs students' help to solve: Look, it's 9 o'clock, but Xiaoming is different. Why?
Health: One is at nine o'clock in the morning and the other is at nine o'clock in the evening.
Transition: Xiaoming's day schedule is really organized! I believe that students will also arrange their own day and be good children who cherish time.
(Design intention: Xiao Ming's schedule is close to students' life and attracts students. Through the familiar and concrete misunderstanding in this exciting life, students obviously feel that "the clock goes twice a day." )
Five, the quality is difficult to doubt, class summary
What did the students learn from this class? What are the problems?
Students want to know so much knowledge. Every child has designed a happy Sunday for himself. I hope every child will cherish time and be the little master of time.
(Design intention: Let students "I can read" and "I can ask", train students to think while reading, report their own gains and exercise their inductive ability. Design allows students to learn how to use their time reasonably and realize that there is mathematics everywhere in life.
Sixth, blackboard design
Know the clock
The hour hand (thick and short) is in full time.
The minute hand (thin and long) is at 8 o'clock.
three?o'clock
Teaching reflection
In the teaching process of Knowing Clocks, I make full use of multimedia courseware and learning tools to mobilize students' multiple senses to participate in learning. Let students learn new knowledge in the case of seeing and touching. You can also use what you have learned to solve problems in practice, which fully embodies the concept that mathematics comes from life and serves life. The design of the whole class and the implementation of classroom teaching mainly reflect the following points:
First, we can choose teaching methods according to students' cognitive and age characteristics, create teaching situations, and better stimulate students' interest in learning.
First-year students' attention is not lasting, and vivid thinking in images is dominant. According to these characteristics, I introduced the scene of lazy sheep being late for school at the beginning, creating an attractive situation. Then, in order not to let the lazy sheep be late, we gave it a gift-clocks, introduced clocks and watches, and enjoyed all kinds of clocks and watches, which stimulated students' enthusiasm for learning and had a strong interest in learning new knowledge. Driven by this strong thirst for knowledge, students are encouraged to actively participate in the following learning activities.
Second, pay attention to students' listening and improve the effectiveness of learning.
If you know the clock face, let the students observe the clock face first, see what is on the clock face, and then call the roll. If it is not complete, students should supplement it, so as to improve the participation in listening, gradually develop the habit of listening and improve the effectiveness of learning.
Third, pay attention to the close relationship between mathematics and life.
Mathematics originates from life, and mathematics without life is unattractive mathematics. I teach this course, starting from the students' existing life experience, looking for mathematics from life, using mathematics in life, fully mobilizing students' enthusiasm for learning, thus generating interest and intimacy in mathematics. If Xiaoming is reading at 9: 00 in the morning and sleeping at 9: 00 in the evening, he is doing different things at the same time, and he feels that there are two 9: 00 in a day. It not only connects with students' real life, but also highlights the cultivation of application consciousness and practical ability.