cylindrical pillow
Understanding the cylindrical model, teaching design and reflection
** I. Teaching Design **
#(I) Teaching objectives
1. To let the students understand the cylinder model, including the names and characteristics of each part, and to establish the concept of the cylinder's geometric model.
2. Through the process of operation and observation, the students 'ability to analyze, reason, and judge will be improved.
3. Cultivate the students 'initiative to explore, develop the concept of space, increase their interest in learning, and establish the confidence to learn mathematics well.
#(II) Difficulties in Teaching
1. ** Main point **
- Understand and master the basic features of a cylinder.
2. ** Difficulty **
- To develop the students 'concept of space, so that the students have a deep understanding of the basic characteristics of the cylinder.
#(3) Teaching process
1. ** Revise old knowledge, preliminary perception **
- The teacher guided the students to observe the learning tools (cuboids, cubes, columns, cones, balls, etc.) and discussed the classification methods at the same table. Through the classification, the cylinder was introduced, and the cuboid and the cube were compared. The characteristics of the cylinder were discussed, such as the cylinder had a plane but not all planes.
2. ** Know the parts of the cylinder **
- Show the model of the cylinder and let the students observe and point out the bottom (two circles of equal size), the side (curved surface), and so on. By touching the model, one could feel that the bottom was flat and the sides were curved.
3. ** In-depth exploration of cylindrical features **
- Comparing the characteristics of the bottom circle, such as diameter and radius. To explore the relationship between the side and the bottom, for example, if the side of the cylinder was unfolded, it might be possible to get a rectangular shape (cut along the height, the length of the rectangular shape is equal to the circumference of the bottom, and the width is equal to the height of the cylinder) or a quadrilateral (cut diagonally, the base of the quadrilateral is equal to the circumference of the bottom, and the height is equal to the height of the cylinder).
4. ** Practice and Consolidating **
- Give some objects and let the students judge whether they are cylindrical or not, or let the students describe the characteristics of the cylindrical model.
** 2. Reflection on Teaching **
#(I) Strengths
1. Through the review of old knowledge and the classification of learning tools, it could better lead to the study of the cylinder and pave the way for new knowledge.
2. In the teaching process, students should pay attention to observing and touching the cylinder model, which is helpful to intuitively understand the characteristics of each part of the cylinder.
3. The exploration of the side of the cylinder deepened the students 'understanding of the relationship between the side and the bottom of the cylinder.
#(2) Inadequacies and improvements
1. In the teaching process, there might be insufficient attention to individual students who understood slowly. In the future, we should strengthen the guidance for students at different levels.
2. It could add more examples that were related to real life, so that students could better understand the wide application of the cylinder in life, thus increasing their interest in learning.
3. The exploration of the characteristics of the cylinder could be more open, encouraging students to discover more characteristics of the cylinder on their own.
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TikTok, same model, popular online pencil case, cylindrical quicksand
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Which is better, a rubber pillow or an ordinary pillow?
Latex pillows had their own advantages and disadvantages compared to ordinary pillows.
In terms of advantages:
- ** Support for shoulder and neck **: Latex pillow is made of natural rubber and has no side effects on the human body. It has good elasticity and support. During sleep, it can make the head, shoulders, and neck receive uniform stress, which can effectively relieve the discomfort of the cervical spine and lumbar spine. Ordinary pillows tend to become soft and collapse after a period of use, and cannot provide effective support for the cervical spine. Long-term use may cause problems such as cervical spine distortion.
- ** Anti-mite and anti-bacteria aspects **: Ordinary pillows are mostly made of feathers and fibers. They have poor breathability and are easy to breed mites if used for a long time. The natural rubber pillow has ventilation holes, which are breathable and moisture absorption, which can effectively suppress the breeding of mites and bacteria. It also has a unique smell that makes mosquitoes unwilling to approach.
- ** Ergonomical design **: Natural Latex Pillow is designed according to human engineering. Under the premise of high elasticity, it can adapt to the human body curve very well. Relying on the human cervical spine, it will not cause any burden on the human body, so that the human body can form a comfortable sleeping environment during sleep. Ordinary pillows are relatively poor in this aspect.
- ** Durability and other aspects **: Natural Latex Pillow is made by high-tech technology, which can effectively reduce the static electricity between the human body and the fiber. It can also absorb the noise and vibration caused by the human body turning over during sleep. The honeycomb structure can quickly release the heat generated by the human body, providing a healthier and cleaner sleeping environment. Moreover, the oak protein in the natural rubber could suppress the breeding of germs and mites, and emit a faint natural milky fragrance. It could effectively alleviate the distress of people suffering from asthma, allergic Rhinoceros and other respiratory diseases. Latex bedding was the ideal choice for patients with respiratory diseases. Natural rubber pillows also had anti-static effects, especially suitable for people who were prone to static electricity.
In terms of shortcomings:
- ** Price and life span **: Latex pillows are relatively expensive. Compared with ordinary pillows, good ones may cost five or six times more and have a shorter life span, especially some cheap ones with poor quality. They may not be able to be used normally after half a year, while ordinary pillows are relatively more advantageous in price and life span.
- ** Care and usage issues **: Latex pillows are prone to yellowing. Once this happens, they can't be used anymore. Latex pillowcases also have a short service life. At the same time, natural rubber pillows can't be exposed to the sun because they will age easily after exposure, causing the surface to turn into powder. Ordinary pillows don't have too many restrictions in these aspects.
The novel " Dream of Silk Fate " is equally exciting. Everyone is welcome to click and read it!
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Far Dream was a large-scale well-known home textile company that integrated a variety of businesses. The material used for the pillow was environmental friendly, and the workmanship was exquisite. It had the advantages of moisture resistance, mold resistance, anti-aging, and anti-bacteria. The surface was soft and comfortable, and the breathability was good. It was good for people's sleep, and the price was reasonable. Yuan Meng's Cassia Seed Pillow Series was not bad. The Cassia Seed Pillow had the effect of improving eyesight and calming the mind. It was suitable for people who needed to improve their sleep quality. Far Dream also launched a new product, the "wormwood hot compress adjusting pillow." The built-in air bag could freely adjust the height and stretch the cervical spine through physical traction to achieve a soothing effect. It could also be placed with wormwood hot compress sheets, which was especially useful for students, office workers, and middle-aged and elderly patients with cervical vertebra disease.
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Guess an educational phrase on the pillow and toilet can refer to the following article:
Pillow on the toilet usually appeared in novels or television dramas. The pillow referred to the bed, and the toilet referred to the toilet bowl. The meaning of this word depends on the context. Sometimes it may mean that both the activity on the bed and the toilet is important, and sometimes it may just be a short description.
There may be many origins for the word "pillow on the toilet". For example, in ancient times, people called the toilet "bedpan" and the habit of using the toilet on the bed "toilet". Later, the word evolved into "pillow on the toilet".
In education, it might refer to the habit of students using electronic devices on the bed or on the toilet as "pillow on the toilet". For example, students might use electronic devices to check information during class, which was seen as a kind of "sleeping on the toilet" behavior.
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