How did the PE teacher draw the perfect circle with his bare hands?

The physical education teacher drew a perfect circle with his bare hands, and netizens joked about it: It may have been a compass in the previous life! When it comes to PE teachers, everyone will recall the bits and pieces they spent with PE teachers when they were in school.

Some may be occupied by the Chinese teacher when the physical education class is stopped, or the physical education teacher on the playground blows the whistle to guide the students in long-distance running skills, or the school requires the students to have morning exercises, and the physical education teacher leads the students to learn the essentials one by one, and there are many, many good memories! <>

Recently, a physical education teacher quickly became popular on the Internet. It turned out that the physical education teacher was on the playground, holding a tool similar to a big spoon in his right hand, and he could draw a perfect circle by walking around the playground casually. Such a large "spoon", there is still a sufficient amount of white powder in it, it looks like there should be a certain weight, this physical education teacher, calm and relaxed, his right hand is very steady, step by step as he walks to draw a circle.

Netizens exclaimed: God skills! <>

In the eyes of the physical education teacher, such a circle is a piece of cake for him. However, when I was in school, when I drew a circle on scratch paper, I drew a little bigger, and if I drew it with my free hand, the circle might become an oval. If you don't use your bare hands, you may have to use the power of "Compass".

So, such a perfect circle is definitely very capable of being drawn. At the very least, the arms must be strong, the steps must be even and steady, and you can't walk too fast or too slow. In addition, from a mathematical point of view, it is best to determine the center of the circle and ensure that the radius remains the same, so as to draw a perfect circle!

Therefore, some netizens ridiculed: The physical education teacher may have been a compass in his last life! <>

I have to admire this physical education teacher, it is indeed a stunt. Just imagine, if the physical education teacher has some tricks to teach to the students, and the students who get the true transmission of this teacher, can they completely abandon the compass? It can also save more time when answering questions.

A PE teacher holds a spoon-like tool in his right hand with a generous amount of white powder in it, and can draw a perfect circle by walking around the playground casually. Practice makes perfect, I have to admire this physical education teacher, it is indeed a stunt. No matter what you do, as long as you study hard, you will definitely be able to do it.

Skill comes from practice. I have to admire this physical education teacher, it is indeed a stunt. In fact, no matter what you do, as long as you study hard and master the rules, you can find out many tricks and do it handy.

He used a big spoon to draw it, which shows that the physical education teacher is very good at drawing, and the master is really amazing in the folk, and I believe that many people will like such a physical education teacher.

The main thing is to practice more, practice makes perfect, and if you draw more, you will naturally draw well, and many things are like this.

Practice makes perfect, and everything can become very clever as long as it is done to the extreme, which takes a lot of practice.

There should be no trick to this, as long as you want to do it, you can do it, and as long as we practice regularly, it is not so difficult to draw a perfect circle, I always feel that the problem is artificial.

Fix a stake in the middle of the playground, then use a long enough rope to tie a loop at one end of the rope and put it on the stake, and tie a circle tool to the other end. Then straighten the rope and make a circle around the stake to draw a circle that is large enough. Note that the end of the pile cannot be fixed, and it must also be able to rotate around the pile, otherwise the rope will become shorter after a turn, and the circle drawn will not be round.

Since the end of the 18th century and the beginning of the 19th century, since Denmark, Germany and other European countries first made physical education compulsory in primary and secondary schools, most countries have taught physical education in primary and secondary schools. In the U.S. Education Act, there is no specific provision for the establishment of physical education courses in primary and secondary schools, but in about 1 2 states in the country, physical education is compulsory, and most of the rest of the schools also elective physical education.

Physical Education Course Structure

The structure of a lesson refers to the sections that make up a lesson, the order of the teaching materials for each section, the organization of the teaching method, and the allocation of time. In physical education classes, it is mainly engaged in various physical activities. The organism bears a certain physiological load and also has a certain amount of intellectual activity.

Therefore, the structure of physical education must follow not only the general laws of human cognitive activity, but also the laws of physiological activity. The law of physiological activities is generally divided into three stages: rise, stability and decline, which reflects the general trend of changes in the working capacity of the human body.

According to the above two rules, the structure of physical education classes is generally divided into: the preparation part, the basic part and the end part. From the table below, you can see the relationship between each part of the lesson and the three stages of human working ability (see attached table).

The three parts of the above class are the basic structure of the physical education class, and the specific structure of each part varies according to the specific tasks of the lesson, the content of the textbook, the situation and number of students, and the differences in the working conditions (venue, equipment, seasonal climate, etc.). The consistency of the basic structure of the class and the unity of the diversity of the specific structure constitute the complete structure of a physical education class.

In order to strengthen the organization of teaching, the preparation part of the primary school physical education class can also be divided into two parts: "start" and "preparation", and become a 4-part structure of the class, which is not fundamentally different from the 3-part structure of the class. Currently, classes are generally structured in a three-part structure. However, in some countries, the structure of physical education classes is not strictly divided.

If the PE teacher wants to draw a big circle on the playground, how will he draw it? Desperate for answers!! Nail it to the ground and draw it with a compass.

Have you ever seen this picture of a PE teacher holding a big spoon and drawing a perfect circle on the playground, this circle? The type is almost perfect, everyone applauds and cheers for the teacher, it seems that the physical education teacher is really versatile and versatile, what do you think when you see this picture? All in all, I think this PE teacher is the best teacher I have ever met.

1. What does the student say about the PE teacher?

There is such a physical education teacher, the students are very proud, some students say that this physical education teacher is the most responsible physical education teacher, it not only takes us to gallop on the playground, when the weather changes, but also reminds us to add or subtract clothes; Some students said that our physical education teacher was versatile, and looking at the circle he drawn, it was like a compass, even more powerful than a compass! Hearing the comments of the students, this PE teacher must be secretly having fun!

Second, the role of the physical education teacher

Today's children not only have to learn cultural knowledge, but also moral, intellectual, physical, and all-round development, and physical education is particularly important for students, which can make them physically strong, exercise, and grow taller. The role of the physical education teacher is very great, the physical education teacher is like our big friend, always caring about our body, accompanying us to exercise, teaching children basketball, football, volleyball, badminton, table tennis ...... during classChildren should also be taught to jump rope, long jump, high jump, ......In short, a physical education teacher is an all-round teacher. Whether it is elementary school, junior high school or high school, every year the school will hold a sports day, the physical education teacher is a teacher and a referee, and also a cheerleader, every time I see a physical education teacher, their smile will always be on their faces, and their voice will always be hoarse, which is very admirable.

3. Physical education teachers can also be class teachers

Have you ever heard of a PE teacher as a homeroom teacher? Now there are countless physical education teachers, they are conscientious and responsible for their own work, they are serious and responsible for their classmates, and they also serve as the head teacher of the students, often see the physical education teacher, holding the computer, listening to other teachers in the back of their class, he wants to see which problems are not understood by the students, which problems are already mastered by the students, and which questions need to be examined. In short, the physical education teacher is also the class teacher, and he is really all-round, just like a big parent.

With the spoon in hand, the breath is calm and relaxed, and the hand is extremely steady. This is the teacher's unique skill, and he is very willing to bow down. Some also say that the physical education teacher should have been a compass in his last life!

Praise is expressed. The physical education teacher who doesn't often hold a pen but can draw a perfect circle with his bare hands is very powerful and commendable.

The students all commented that their teachers were really amazing, and it also reminded me of the physical education teacher in our school back then, who was also a very capable person.

I think it's a great achievement for a PE teacher to be able to draw a perfect circle with his bare hands, which shows that the teacher doesn't just win with his athletic skills, but also has a very good talent for math.

The students admired the teacher very much, and they were all conquered by the teacher's unique skills. In fact, as the so-called champion in the line, as long as you are willing to use your brain, everyone has a brilliant highlight moment!

Fragment 1: Draw a circle on the playground.

Teacher: Where do you usually take math classes?

Sheng: Okay! (The students followed the teacher to the playground with an excited face).

Teacher: Now the teacher wants to draw a relatively large circle on the playground, how do you draw it? Who has the means?

Raw 1: Draw with a compass. (Immediately some students objected: there is no such a big compass).

Student 2: Our classmates hold hands in a circle, and then draw a Hongdan.

The teacher pointed out the shortcomings: this circle is not very standardized.

Teacher: The teacher has ropes, nails, and pens here, so let's try them with your method, the teacher will be your assistant, you will command, and we will draw and see.

This is a very good way to draw a circle on the playground, and the teacher catches the student's speech at the right time to teach).

Student 3: Fix one end of the rope to the playground with a nail**.

Teacher: (holding a nail and pointing to the edge of the playground) I'll nail it here, okay?

Sheng: No, it's too far to the side, there is not enough space to draw, it has to be nailed in the middle.

Teacher: Then you choose a position, and the teacher will press the nail for you, and you will draw it.

The student chooses the position of the nail, then wraps the pen around the other end of the rope, straightens the rope and starts to circle around the middle nail.)

Teacher: Look, you have really drawn a big and standard circle using your classmates' methods, and you really have an idea.

Comment: The new concept of modern mathematics teaching is very important in teaching design, which is to guide students to learn, understand and develop mathematics in the process of studying practical problems based on the objective facts of life experience, and to close the connection between mathematics and students' real life. What is the method of drawing a big circle on the playground?

How to draw? This is a very incursive problem, and students are willing to think about it, they are willing to solve real problems, and they feel that it is worthwhile to solve such problems. When choosing the position of the nail, the teacher deliberately induces the students to nail the nail to the side, so that the students have subconsciously realized the position of the nail, that is, the center of the circle determines the position of the circle.

This lesson gives students a new feeling at the beginning of the class, and the math class on the playground has never been done before, and this kind of relaxation and pleasure will inevitably bring about the activity of students' thinking. ]