Reflection on electric power teaching

Part 1: Reflection on electric power teaching

This lesson is the key point and difficulty in the physics and electrical part of the country. Because of this part of the formula, the physics knowledge is abstract, the students are not easy to understand, the memory can not be confused, especially the calculation is more, the number is not good, and the students are made into the cloud. In the fog, for some students, they even felt that they could not start.
How to compare the consumption of electric energy in teaching, I use the electric energy meter to directly demonstrate the different electrical appliances to the electric energy meter. The students observe the speed of the aluminum disc rotation, so that students can more intuitively understand the speed of the aluminum disc of the electric energy meter. The relationship with electrical appliances. And guide students to compare the speed of exercise compared with the national small to compare the speed of energy consumption, thus overcoming the two methods that students can only find from the book, it is easier for students to understand the meaning of electric power.
Because the new version of the textbook does not deal well with the electric power, according to the previous teaching experience, the students often confused the electric power and electric power. Therefore, the two concepts are compared in the teaching and the students are identified. Ye Heng’s performance was very good. The two concepts were analyzed and the students finally understood.
For the middle and lower class students, it is somewhat difficult for the calculation. The main reason is that the students are not sure about the quantity. The formula can't be remembered. In the teaching preparation, students are emphasized to pay attention to the examples in the book. Through the example questions, the understanding of each quantity is deepened. According to the example, what kind of letter is used to indicate the physical quantity, and what is the unit. The purpose of this is to allow students to distinguish each physical quantity and unit to deepen their understanding and understanding. At the same time, the formula is dictated before the class every day, and the deformation of the basic formula is deepened to deepen the memory of the students. In short, this class passed the above repeated study, and the students in my class basically learned.

Chapter 2: Reflection on Electric Power Teaching

Electric power is the focus and difficulty of teaching in the middle school. Due to the large amount of content and complicated calculation, it is necessary to arrange three classes to complete. This section talks about the meaning of electric power, the meaning of formula and rated power and its applicable conditions. The following two lessons are experimental and In calculation, the knowledge content and depth of the three lessons are the same, but they are strengthened and consolidated from different aspects, so that students can understand and master the electric power.
The power of the bulb changes with voltage, and the voltage change will cause the filament temperature to change, which causes the filament resistance to change. The resistance change affects the actual power. It is an extension content, which can be determined by the student's situation in teaching.
The difficulty of this lesson is that students are confused about the rated voltage, rated power and actual voltage, and actual power. It is more difficult to solve the problem by reusing the electric power formula and the Ohm's law formula. To solve this difficulty, one should do a demonstration experiment of connecting the marked bulb to different voltages. The second is to solve the problem step by step, and make clear what is known about each step. Since there is a lesson devoted to calculations in the future, the exercises in this lesson should be based on simple calculations using formulas directly.

Chapter 3: Reflection on Electric Power Teaching

First, the reflection of teaching effects.
1. The teaching task of this lesson is: Simple calculations can be made using the electric power formula P=UI and its deformation formulas U=P/I and I=P/U, and the electrical knowledge learned can be comprehensively solved to solve simple electric power. Calculate the problem. The gap between the actual teaching effect and the lesson plan is not too big. More than 80% of the students have completed the learning objectives, and the effect of knowledge guidance is obvious. Most students have a very accurate formula in knowledge transfer.
2. In this class, the teachers explain the teaching difficulties in the classroom and point out the key points of the teaching. The students complete the learning objectives by reading the teaching materials and practicing with appropriate amount of exercises. The teaching method and the learning method are integrated into one, and it can be described as a pair of birds.
Second, the reflection of the teaching process.
The core of the classroom teaching is the teaching process. In this lesson, the teacher draws on Guo Sile's “Birth Education” and Han Lifu's “Effective Teaching” theory to design a guiding case that is more suitable for students to learn independently.
By reading the learning objectives, the students perceive the knowledge and skill goals, so that the students can truly understand the content of the new lesson and the learning requirements, so that the learning objectives are clear and targeted. In the process of consolidating old knowledge, students are able to lay a solid foundation for learning new knowledge by warming up old knowledge. This brings all students to the same starting line of the previous knowledge point. Then, the students read the teaching materials independently with the questions designed in the tutorial, and the teachers inspected in the classroom to learn that most students can acquire new knowledge to solve problems. Immediately afterwards, most students can use the new knowledge to complete the new knowledge training problem, and the rate of compliance is more than 80%. After that, through the comprehensive application of new and old knowledge, most students are more likely to acquire new knowledge again, which better cultivates students' ability to comprehensively apply knowledge analysis and solve problems, and truly achieve sublimation of knowledge; In the end, the students basically completed the new knowledge consolidation training with specificity, typicality and gradient. Due to the low computing power of students in other links and the obstacles to solving problems, the time at the end of the class is slightly insufficient. Therefore, the two links of “new knowledge consolidation training” and “knowledge point induction” are not implemented very well. The teacher also had to hang out the small blackboard that had already been prepared, and asked the students to copy the design of the blackboard in the guide.
Third, reflection on teaching inspiration.
The main reason for the small mistakes in teaching is that teachers do not understand students well and estimate the knowledge base of students too high. I would like to take good care of the suggestions of the teachers who care about me and care for them in order to improve their future classroom teaching.

Chapter 4: Reflection on Electric Power Teaching

"Electric Power" is the eighth chapter of the eighth chapter of the eighth grade of the People's Education Edition. It is another basic electrical concept for students to learn after current, resistance, voltage and electric energy. It is also an important indicator on the nameplate of electrical appliances used in life. The content of this section is not only the deepening and specificization of electric energy knowledge, but also let students understand the relationship between the speed of power consumption and power consumption when working with electrical appliances. Also for the study of the third section of this chapter "Measurement of the power of small light bulbs", the fifth section "Electrical power and safe use of electricity" is theoretically prepared.
This section of the textbook has more content, involving four knowledge points: the concept of electric power, the origin of kWh, the rated power, the measurement principle of electric power in life, etc., including concepts and principles. Two demonstration experiments, one small piece of information, two cases of nameplate display, two cases of physical display, and two tips for warning. The rich content of the textbook not only provides sufficient resources for teaching, but also has a lot of troubles and difficulties for students to learn. However, it is a key chapter for future study and plays a very important role, so I attach great importance to the teaching of this lesson. When I was in class, I paid attention to three points and the effect was good.
1. The pace of class is as fast as possible. The analogy with speed can't be delayed for too long, let students mention the concept of speed, the formula can be analogous to the concept and formula of electric power.
2. The understanding of formulas and principles is mostly solved through training. It is not too difficult to set the exercises in the class. It is important to apply the formula and let the students familiar with the unit conversion of the formula. More exercises can be placed later. The design of the numerical value should also be based on the number of the number. Too difficult, too deep pure mathematical calculations to save classroom time.
3. Pay attention to let the students do more hands-on, let the students find some common problems and solve them in a unified way to improve the efficiency of the classroom.
In this lesson, I realized that when I was teaching people, I should pay attention to the development of their abilities and cultivate the correct emotional value orientation. I realized the happiness of being a teacher. Students showed strong curiosity in the classroom, strong I want to express my desires and say that I am wrong. I feel that physical knowledge comes from life and serves the characteristics of society. I have learned physics and it is really useful. As long as I pay attention to life and people, I can learn physics well. The ability of the experiment has also been improved. Through group inquiry activities, the students' ability to communicate and cooperate has been improved. Each student has participated in the learning process and enhanced self-confidence.
As the saying goes: "To give students a glass of water, teachers have to have a bucket of water." As open, democratic, and scientific courses enter the physics classroom, there are many “variables” in the teaching process. Teachers must have a comprehensive and detailed understanding of the knowledge and related content of this section. It is not enough to rely solely on teaching. There must be a strong ability to adapt to class. In the process of teaching, I have encountered a problem to be solved in extracurricular activities. In order to let students know more about the advantages of energy-saving lamps, before the class, I went to the library to check the information, collect information online, and read newspapers and magazines. In other ways, we have a comprehensive understanding of the relevant knowledge of energy-saving lamps. We have made relevant understandings on the performance indicators and popularization of energy-saving lamps, and why it is difficult to promote such knowledge in the whole city and even the whole province. Therefore, students mentioned this. I can handle it when I have problems.

Chapter 5: Reflection on Electric Power Teaching

In the course of this lesson, I think there is still a need for improvement:
1. In the process of organic integration of information technology and classroom teaching, the interaction between the content of the board and the content of the media needs to be further trade-offs to avoid excessive time spent due to the occurrence of more repetitions, resulting in the invisible compression of the classroom capacity.
2. As the leader in the process of teaching implementation, teachers are mainly “guidance” rather than “replacement”, so that students “think of it, write it down, write it out” will better cultivate students. Awareness and ability to learn independently.
3. The characteristics of physics - experiment, can be interspersed in the curriculum, used to test the correctness of theoretical knowledge; can also be used as the beginning of the whole class, as the clues for students to explore new knowledge throughout, each has its own advantages, teaching We can boldly reorganize, try to change, find the most suitable teaching method for students, and truly reflect the "teaching according to their aptitude" and "people-oriented".
Like the students who are at the schooling stage, I also have endless learning in terms of teaching skills. In that case, it is "no best, only better." The student group is constantly changing and developing. The teaching methods will also vary from person to person. In the process of teaching design and implementation, I will continue to explore more reasonable teaching methods and strive to make my teaching level more progress. Your own students have a greater gain in their studies!