Reflection and Evaluation on the Teaching Plan of Iron Salt in Senior One ChemistryThe following is a reflection and evaluation of the iron salt teaching plan for senior high school chemistry:
** 1. Achievement of teaching objectives **
1. ** Knowledge and Skill Target **
- If the teaching goal was to let the students master the properties and mutual transformation of iron salt and iron salt, it might not be completely achieved through classroom teaching alone. For example, in the experimental teaching of the preparation of iron dioxide and iron dioxide, although students could summarize the relevant properties and transformations from the experimental inquiry in the classroom (including watching videos), in order to truly master it, intensive training after class was indispensable. For example, the conversion of iron salt and iron salt under different conditions of the oxido-reduction reaction required students to practice with more examples before they could use it skillfully.
- In the teaching of the test method of iron salt and iron salt, the students may only understand the basic test methods in the classroom, such as using KSCN solution to test Fe3 +. However, there may be less interference factors and more complicated identification situations in the practical application, which may affect the students 'comprehensive mastery of this knowledge and skills.
2. ** Course, Method, and Target **
- In terms of inquiry-based learning methods, such as through self-designed experiments, observation and analysis of experimental phenomena to draw conclusions, this design helps to improve students 'inquiry ability. For example, when designing the preparation experiment of iron dioxide, he guided the students to master the preparation skills through the thinking process of question setting, discussion, and induction. Then, he sublimated the preparation experiment design through relevant exercises and extended it to the preparation of the principle of electrochemistry. This process could stimulate the students 'curiosity and provide a good opportunity for thinking training.
- However, in the experimental teaching segment, if the experimental conditions were limited (for example, the school's scientific construction could not demonstrate the experiment on the spot), only watching the video might affect the students 'feelings for the experimental details, experimental operation skills, and the intuition of the experimental phenomenon to a certain extent, thus hindering the achievement of the process and method goals.
3. ** Emotions, attitudes, values, goals **
- If the teaching plan consciously infiltrated the cultivation of the core quality of chemistry in the teaching process, such as guiding students to pay attention to the application of chemicals in life, such as some uses of iron salt in life, it could make students realize the close connection between chemistry and life, thus increasing students 'interest in learning chemistry.
- However, if there was a lack of in-depth guidance on the social responsibility of chemistry in the teaching process, such as the advantages and disadvantages of iron salt in environmental management and industrial production, it might not be comprehensive enough to achieve the emotional attitude and values goals.
** 2. Teaching content **
1. ** Completeness of the content **
- The teaching content of iron salt and iron salt should cover many aspects such as properties, inspection, and mutual transformation. Judging from the teaching plan, if the mutual transformation was limited to several specific oxido-reduction reactions in the classroom (such as adding KSCN solution to FeCl3 and FeSO4 solution, adding iron powder to FeCl3 solution with KSCN, and adding chloride-water to the mixed solution of FeSO4 and KSCN, etc.), the other possible transformation pathways or the transformation relationship in actual industrial production were less involved, and the completeness of the teaching content was lacking.
- When describing the properties of iron salt and iron salt, the differences in their properties and stability in different media (such as acidic, basic, etc.) might not be explained in depth, which would affect the students 'comprehensive construction of the knowledge system.
2. ** Difficulty Level of the content **
- For Grade One students, the teaching content of iron salt and iron salt itself was difficult, especially when it involved the application of the principle of the oxido-reduction reaction. If the lesson plan did not guide the students step by step based on their existing knowledge, such as the introduction of a more complicated oxido-reduction reaction equation when explaining the mutual transformation of iron salt and iron salt, it might make it difficult for some students to understand, resulting in the difficulty of the teaching content being inappropriate.
- On the other hand, if the explanation of some complicated concepts (such as the relationship between the change of iron's valency and the electron transfer of the oxidoreduction reaction) was too simple, it would increase the difficulty of students 'learning and affect the teaching effect.
** 3. Teaching methods **
1. ** Experimental Teaching Method **
- Experimental teaching was very important in chemistry teaching, especially for iron salt and iron salt, which required an intuitive understanding of the properties and transformation through experimental phenomena. If on-site experiments could not be carried out due to school facilities and other reasons, and only video teaching was used, although the experimental phenomenon could be observed, the students would not be able to personally experience the details of the experimental operation, such as the dosage of reagents, reaction rate control, and so on.
- In terms of experimental design, although many experiments were designed in the lesson plan to explore the properties and transformation of iron salt and iron salt, students might not be able to accurately understand the reliability of the experimental results and the problems that might be encountered in actual operation if there was a lack of teaching on experimental error analysis.
2. ** Investigative Teaching Method **
- The application of inquiry-based teaching method is helpful to cultivate students 'independent learning ability and scientific inquiry spirit. For example, in the lesson plan, students were asked to design experiments to identify iron salt solution and iron salt solution through layers of questions. This teaching method could provide students with a larger space for thinking and promote cooperation and inquiry among students.
- However, if the teacher guides too much during the inquiry process, such as interfering with the students 'thoughts when they discuss the experimental design, it may suppress the students' creative thinking and affect the effect of the inquiry teaching method.
** 4. Teaching Evaluation **
1. ** Single evaluation method **
- If the teaching evaluation in the lesson plan mainly relied on classroom questions and the students 'summary of the experimental phenomenon, this evaluation method was relatively simple. The evaluation of the students 'understanding of iron salt, application ability, and thinking ability in the process of inquiry was not comprehensive enough.
- The lack of evaluation design for students 'homework, experimental reports, and other aspects made it impossible to fully understand the students' mastery of the teaching content and the problems in the learning process.
2. ** Timeliness of evaluation **
- During the teaching process, if the students 'answers and experimental operations were not evaluated in time, it might make the students unable to understand their own learning situation in time, thus affecting their enthusiasm for learning. For example, after the students conducted experiments on the properties of iron salt and iron salt, if they could not evaluate the results and analysis of the students in time, the students might have doubts about their own conclusions, which was not conducive to the consolidation of knowledge and the improvement of learning ability.
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What kind of clothes does the host wear to look good in summer? Girls 'videoThere were many factors to consider when it came to the female host's outfit for the summer engagement ceremony.
First of all, neatness was a basic requirement. The clothes did not have to be luxurious and high-end, but they had to be clean and tidy so that they could leave a generous and decent impression.
There were no specific rules for colors. However, if you want to fit the festive atmosphere of the engagement, you can choose some bright and warm colors, such as pink, which can highlight the feeling of happiness and sweetness. It is more suitable for girls with princess dreams, but if the skin color is darker, you may need to try it on first. Orange is also a brighter color in the warm color system, which can give people a feeling of happiness and wealth. Red is a traditional festive color, which can enhance the atmosphere. Of course, the color could also be determined according to the theme of the engagement ceremony.
In terms of clothing choice, it had to be in line with the host's identity and could not wear casual home clothes. To suit their own conditions, if they were short, they could choose simple and colorful clothes. If they were tall, they could choose clothes such as skirts with longer sleeves. At the same time, they had to consider the skin color. If the skin was white, they could choose a wider range. If the skin color was dark, they should try to avoid dark colors.
Supporting facilities were also very important. Shoes should choose a more formal style. Sandals were not suitable. Leather shoes could choose a versatile color like black. Shoes could choose transparent colors or colors similar to the color of clothes. If it was a traditional Chinese engagement ceremony, one could choose a more traditional dress. If it was a Western-style ceremony, one could choose a formal dress.
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