General High School Chemistry Curriculum Standard (2017 Edition) emphasizes the concept of STSE education. To understand more deeply the characteristics of STSE education contents in senior high school chemistry compulsory textbooks of luke, taking the new and old senior high school chemistry compulsory textbooks of luke as the research object, comparing the characteristics, similarities and differences of the STSE contents of the two textbooks, aiming at strengthening the STSE education of students, cultivating scientific attitude and social responsibility, this paper puts forward some suggestions for teachers to use the textbooks.

In view of the deficiency of humanistic dimension from the background of contemporary core literacy of the discipline, four typical cases of interdisciplinary column with obvious humanistic implication characteristic and rich connotations have been selected, and the structure and teaching value of humanistic connotation dimension in them have been analyzed in order to obtain the humanity intelligence of discipline and enlightenment on education by taking American mainstream science textbook Chemistry: Concepts and Application as the research object. The communication between the two worlds of science and humanity has been promoted through the dialogue with each other; The humanistic brilliance of scientific spirit has been carried forward through the revolutionary transformation of science; The humanistic aesthetic intention in harmonious unity of nature and art has been advocated; The progressive humanistic thought including social responsibility and maintaining peace and justice has been shouldered. The cognitive guidance has been provided for the research and development of humanities teaching resources in the subject teaching; Some references have been presented to improve the core literacy content of the discipline; And a few strategy suggestions have been put forward for the teaching application of the humanistic teaching resources from four aspects such as the concept of material selection, teaching preparation, course teaching and goal achievement.

Based on the model of disciplinary competence in chemistry, this paper determines the index of disciplinary competence assessment in chemistry, and on this basis, analyzes the disciplinary competence requirements of the chemistry questions in Jiangsu Province college entrance examination from 2008 to 2020. The test characteristics and change trend of chemistry disciplinary competence in Jiangsu paper are obtained, and relevant teaching suggestions are put forward.

Based on the newly added “Chemistry and Occupation” column in the compulsory new textbook of the People's Education Press, the paper presents a teaching design and implementation case of “industrial production of sulfuric acid”. Students are invited to play the role of “chemical engineer”, they conduct a discuss on a critical research topic, which is how to prepare sulfuric acid in chemical industry. After theoretically analyzing the procedure of sulfuric acid production, simulating the specific reaction to be used in actual production,and doing a field study of sulfuric acid production in chemical factories, students are expected to obtain more knowledge and also a better understanding of chemistry-related occupations and therefore develop interest in chemistry as a career orientation.

With the theme of “the guide to the use of 84 disinfectant”, the teaching of “the nature of hypochlorite” in senior high school chemistry was carried out. Students try to understand the nature and bleaching principle of hypochlorite by completing the following five tasks: “one picture to explain the disinfectant” “explore the relationship between the bleaching effect of 84 disinfectant and the pH value” “explore the relationship between the bleaching effect of 84 disinfectant and light” “the relationship between the bleaching effect of 84 disinfectant and temperature” and “will there be chlorine gas in the mixture of 84 disinfectant and alcohol”, It has trained the students' ability of literature search, experiment ability and the development of students' high-order thinking ability. The key to successfully complete the project teaching is the combination of literature review and students' experiments, in this way, students can complete the internalization of hypochlorite properties and other related knowledge in solving real problems.

This paper describes the senior three review lessons of copper compounds based on the theme teaching idea and valence-species diagram. In the teaching,teacher guided students to understand the transformation between element compounds from the material category, redox and chemical equilibrium. It realizes the relevance and advancement of the subject content, promotes the improvement of students’ thinking ability and the construction of subject concept. This lesson is a live webcast class. Students can answer questions online, share the experiment plans designed by the students in class WeChat.

Based on the reality of the students' lives, the metal review lesson starts with the warm paste that students are familiar with, and adopts the project-based teaching method. The project-based teaching method enables students as the project implementers, and mobilizes students' enthusiasm and initiative in learning, and cultivates students' practical ability, thinking ability and the ability of comprehensive application of knowledge, in order to facilitate students' in-depth and comprehensive grasp of metal knowledge.

Since its introduction, the triple representation of chemistry has attracted the attention of researchers and has guided the theory and practice of chemistry teaching. However, there is no consensus on some basic issues and concepts of triple representation. Based on the clarification and definition of the connotation of triple representation, this article discusses the new achievements of international research on triple representation in recent years, and the related researches can bring thinking and enlightenment for the further research of triple representation.

In this work, we sought to mix CH₃COONH₄ solution with distilled water, NaCl, HCl and NaOH solution at room temperature respectively and used digital conductivity sensor to measure the conductivity changes of them. Utilized the experimental data and images as evidence so as to reason out the essence and occurrence conditions of some ion reactions in order to promote students' understanding of the connotation of ion reaction and implement the core literacy dimension of “evidence reasoning and model cognition”. This research is to supplement and expand the content of the textbook, and provide a reference for teachers to expand the teaching practice of ion reaction.

Because of its characteristics of constructiveness, interactivity and intuitiveness, thinking visualization presents certain advantages in improving higher-order thinking in chemistry. Possible ways of using visualization tools to develop higher-order thinking in chemistry include: using the double bubble map to develop comparative thinking, using the tree map or concept map to develop structured thinking, using the flow map and brace map to develop generalized thinking, and using the multi-flow map or fishbone diagram to develop causal logic thinking. In chemistry teaching, giving full play to the functions of thinking visualization tools, such as “inducing”“adding”“distinguishing”and “reflecting and sorting”, and infiltrating the training of higher-order thinking into the teaching of concepts, principles and problem solving, it is expected to realize the leap from idea to practice in the development of higher-order thinking in chemistry.

Based on the same literature, experts, proficient and novice teachers made the chemical process flow questions in senior high school, through the analysis of test elements, comparison of measured results and significant difference test, this paper analyzed the differences and performance of chemistry proposition among experts, proficient and novice teachers, to provide a beneficial reference for improving teachers' proposition level.

A questionnaire of the present situation of high school students' chemistry learning achievement motivation level was compiled on the basis of chemistry characteristics and revising the AMS. Questionnaire and interview method were used to investigate the current level of high school students' achievement motivation in chemistry learning. The results show that it is at a medium high level under the new course reform. There are significant differences in the level of chemistry learning motivation among students of different genders and academic achievements. When facing the chemistry learning task that measures one's own ability, students have the highest level of motivation to pursue success and the lowest level of motivation to avoid failure. But when facing with uncertain chemistry learning tasks, the opposite is true. Compared with chemistry exercises, students have higher level of achievement motivation while facing chemical experiments and scientific inquiry activities. Based on this, inspirations for motivating and training high school students' chemistry learning achievement motivation are proposed.

In view of the shortcomings of the flame reaction teaching, the hand-held technology TQVC concept cognitive model is used as the theoretical basis, at the perspective of “mixed and quantitative”, the digital experiment of the hand-held technology is designed to promote students' cognition of the concept of flame reaction. This study uses a spectrophotometer sensor to detect the NaCl and KCl in the mixed liquid from both qualitative and quantitative aspects by measuring the wavelength and light intensity of the flame emission spectrum, helping students understand the essence of flame reaction from the perspective of the combination of macro and micro.

The equilibrium of precipitation and dissolution of insoluble silver halide electrolyte is a key point in middle school chemistry teaching. The MXLab21 advanced digital experimental system developed by our project team cooperated with the silver-sulfur ion electrode to explore the precipitation curves of Cl^-, Br^-, I^- and their mixed ions with AgNO₃ solution as titrant. The precipitation curves presented the change of electromotive force (E) with AgNO₃ solution volume (V). The precipitation curves of three kinds of single ions could directly reflect the relationship between titration E jump range and solubility product of the corresponding precipitation and the change rule of titration E jump range. Through the precipitation curves of mixed ions, the feasibility of step by step precipitation was explored in the case of the mixture of two or three ions. The establishment of dynamic E-V curves of the precipitation and step-by-step precipitation of Cl^-, Br^-, I^- plays an important role in middle school chemistry teaching, and is of great value to the development and cultivation of the core quality of chemistry.

Through a series of experimental explorations to further understand the properties of NO, it is found that NO can show oxidation under different conditions, and NO with Cu⁺ will form an unknown stable complex; In addition, from the perspective of environmental protection, based on the oxidizability of NO under different conditions, a possible scheme for the conversion of automobile exhaust gas and industrial waste gas is proposed.

This paper explored and improved the experiment of the reaction between ethanol and sodium, and could observe the light blue flame of hydrogen combustion for a long time by exploring the optimum dosage of reaction reagent. This paper studied the conditions of ethanol vapor combustion by simulating the experimental conditions and using alcohol detector, and it showed that ethanol vapor had no effect on hydrogen combustion when used the optimum reagent. After the experiment was improved, we could obviously observe the light blue flame of hydrogen combustion under ordinary visible light.

This article is based on the principle of chemical equilibrium, through simple calculations to explain the reaction mechanism of copper hydroxide dissolved in ammonia, and at the same time based on the valence bond theory and Jahn-Teller effect to illustrate the formation process of [Cu(NH₃)₄]²⁺ and other copper ion complexes.

Brønsted acid-base theory is one of the most important modular in general chemistry, which usually begins from aqueous solution of weak acids. This theory will be endowed with expanded application if all proton compounds are considered. If so, the K_a value will expand more than 100 orders of magnitude. The evaluation of the “strongest” acid or base is a common topic among students, which provides a nice chance to introduce the concepts of superacid and superbase for students. These concepts will expand the knowledge horizon of students, meanwhile deepen the understanding of Brønsted acid-base theory, which helps the study of analysis chemistry, inorganic and organic chemistry in the future.

Based on the international literature on science education, three representative and influential evaluation tools of science teaching design, SLPRI, SLPAI and 5E ILP, are reviewed and compared. It is found that the contemporary science teaching design evaluation tools show the development trend of concretization of applicable object, specialization of evaluation indices and refinement of scoring standard. This paper makes three recommendations on science education in our country: teacher training, teaching design and the development of teaching design evaluation tools, and appeals to our scholars should be more engaged in the research of the evaluation of science teaching design.