This paper introduces a brief history of the evolution of Chinese rouge and classifies the rouge from a chemical perspective: inorganic rouge, organic rouge (natural plant rouge, organic synthetic rouge). Then carries out simulation experiment research with samples of rouge, in order to explore the production process of rouge and analyze the composition of the red material and the chromogenic mechanism of rouge. This article expounds the deficiency of each phase, popularizes the red chemistry knowledge in rouge, makes students understand the important significance of chemistry to beauty and health, and feel the infinite charm of chemistry.

According to the historical and practical needs of chemistry curriculum, this paper begins by elaborating the comprehensive nurturing value of chemistry curriculum from multiple perspectives. The condensation ideas of core competencies in the Chemistry Curriculum Standard (2022 Edition) for Compulsory Education of China is analyzed. It proposes the connotation and extension of the elements of core competencies. After that, the relationship between the two core competencies systems in the junior and senior high school is sorted out. In the end, the characteristics and applications of the construction of chemistry curriculum objectives and chemistry academic quality standards system based on core competencies are discussed in this study.

A comparative analysis of the contents of heat of reaction in the new and old PEP editions textbooks from the curriculum standard, organization of the conceptual structure, and teaching materials reveals that: (1) The new curriculum standard emphasizes the subject understanding of heat of reaction. The content of the new curriculum standard permeates basic concepts such as the concept of change and conservation as well as highlight the importance of learning materials; (2) The content organization of the new textbook clarifies the relationship between the core concepts like heat of reaction, enthalpy change and energy conversion, and emphasizes the importance of structural understanding of heat of reaction; (3) The new textbooks have enhanced contextuality and scientificity in pictures, experiments, and exercises. It is recommended that teachers enhance their subject understanding of heat of reaction in teaching, use conceptual composition strategies to promote the structuring of students’ knowledge, create real situations to improve students’ problem-solving ability, and cultivate the core literacy of chemistry.

Taking “exploring the influencing factors of electromotance of primary battery” as the learning theme of the project, this paper set 4 key project tasks: exploring the application of chemical battery, exploring the working principle of primary battery, measuring the electromotance of primary battery and making primary battery with high electromotance, and then presented the designing ideas and teaching practice of interdisciplinary project teaching about “chemical reaction and electricity” in high school chemistry.

Analyzing the teaching subject and content and the current teaching situation, this paper puts forward teaching ideas and creative thoughts. “Beijing Winter Olympics” is set as the main clue, and the contents related to energy, materials and environmental pollution prevention in Chapter Nine are intrinsically linked. The review consists of three main parts: clean energy supporting “Green Winter Olympics”, new materials helping with “Science Winter Olympics” and anti-fouling technology guarding “ Clean Winter Olympics”. It motivates students to improve knowledge system, to foster the core competence of “scientific attitude and responsibility” and to reflect on classroom instruction.

According to the history of Boyle’s research on combustion, the combustion conditions were innovatively designed for the experimental study, and a new idea of “superposable” combustion conditions was put forward. By taking “combustion-extinguishment-control” as a main line, that conditions were a basic perspective for understanding chemical reactions was consistently articulated, and the chemical concept of substance transformation under certain conditions was implemented. Based on the idea of chemical reaction control, the field of view of reaction control of “combustion, complete combustion,slight combustion and extinguishment” was innovatively designed, and the learning activities of scenario, activity and task were integrated together. The chemistry knowledge was integrated with the fields of aesthetic education and Chinese language and culture by resetting the teaching value orientation of the experiments in the textbook and combining the aesthetics of combustion with Chinese characters.

Taking “the production of invisible ink” as the theme and starting from the magical phenomena in life,the special review teaching of “acid and base” in junior high school chemistry is carried out. Through students’ personal understanding of the principle, hands-on production, display and application of “invisible ink”, students can better master the acidity and alkalinity of the solution and the discoloration of the indicator, and understand the concept, chemical properties and chemical reactions of acid and alkali. Driven by multiple tasks, students’ practical ability and problem-solving ability are continuously enhanced, their awareness of scientific inquiry and discipline core literacy are continuously improved, and they can personally feel the close relationship between chemistry and life and the charm of chemistry.

Using the application of Na₂CO₃ and NaHCO₃ in life, this paper creates situations to recognize their differences in nature. Based on the existing cognition of the chemical properties of Na₂CO₃, this paper carries out the prediction and experimental verification of the chemical properties of NaHCO₃, guides students to build ideas and methods for analyzing and studying the properties of substances from the perspective of constituent particles and substance categories, and pays attention to the development of students’ logical reasoning ability, highlights the guiding function of core concepts on the learning of elements and compounds, and transforms knowledge into literacy.

Under the new era of core literacy-oriented chemistry teaching practice, the cognitive model of corresponding topics is constructed based on the understanding of chemistry subject, which can improve teachers’ understanding level of chemistry subject, and then carry out literacy-oriented classroom teaching to promote teachers’ professional development, thus providing important ideas and directions for the theoretical and practical research of chemistry education. Taking electrochemistry as an example, this paper constructs its cognitive model based on the understanding of chemistry subject, hoping that its research ideas and process can enlighten the theory and teaching research of other chemistry subjects.

Based on structure and function, transformation and energy, the unit teaching of structure, properties and applications of sweet molecules xylitol and glucose are designed and implemented. This unit teaching creates a situation based on the identification of xylitol and glucose, which stimulates students’ interest through the fact that xylitol has silver mirror reaction, and guides students to construct the relationship between the structure and properties of multi-functional organic compounds from the interaction between groups. The possibility of silver mirror reaction of erythritol and other saturated polyols is predicted and verified. The knowledge will promote students to dialectically understand sugar substitutes from the perspective that properties determine applications, and scientifically select sugar substitutes. Furthermore, the understanding of the decisive role of polar unsaturated bonds on the properties and uses of organic compounds from the perspective of steric hindrance is developed. This unit teaching develops students’ qualities such as macro micro combination, evidence reasoning, model cognition and scientific spirit, and promotes the integration of “teaching, learning and evaluation” through group cooperation.

According to the characteristics of quantitative experiment review in senior three, the teaching practice based on the cultivation of core literacy of “model cognition” was carried out by taking “determination of molar salt purity” as an example. Research and analysis of teaching background, design ideas, teaching process and other aspects, and carefully select materials to trigger model cognition; high-quality questions, construct model cognition; Combining point, line and plane, enriching model cognition and so on, this paper analyzes and explains the chemistry teaching to promote students’ “model cognition” accomplishment.

Thematic Project-Based Learning (TPBL) in chemistry is a way of learning in which students are inspired by their previous project experiences to explore real and intrinsically linked driven tasks in a thematic context. The projects in TPBL are not independent, but are interlinked and integrated into a thematic context. The “similarities” between projects provide opportunities for students to transfer and apply knowledge, while the “differences” force students to think critically about the scope of their knowledge. The constant interaction between old and new items links the learning journey of students, allowing for continuous growth of experience and cognitive development.

This paper reviews the aspects of establishment, content, characteristics on chemical PCK rubrics, as well as the research design and purpose of the empirical research using the rubrics. The review shows that: (1) Domestic and foreign research mostly build rubrics based on existing results, and rarely based on original data. Compared with foreign research, domestic research on the latter is more scarce; (2) Domestic and foreign research mostly measure KoC, KoL, KoS, but less KoA, CTO and integration; (3) Domestic and foreign research mostly use subject-specific rubrics, and a small number of domestic research have developed topic-specific rubrics; (4) Compared with foreign research, domestic research use less concept map and qualitative-quantitative mixed analysis method; (5) Compared with foreign research, domestic research pay more attention to ascertaining research, but less to explore the relationship between PCK levels and other variables, as well as interventional research. At the end of the paper, some suggestions are put forward for the development of localized PCK rubrics for empirical research and chemistry teacher education.

Taking the identification and transformation of Fe³⁺ and Fe²⁺ as an example, this paper introduces in detail the selection of paper and pencil and reagent concentrations, painting pattern design, micro-lesson application and effect analysis of painting experiments, and also carries out some chemical reactions of “iron and its compounds”. The painting experiment highlights the color beauty of the chemical experimental phenomenon, stimulates the students’ enthusiasm for learning to a certain extent, and is an innovative experimental method worth trying.

At present, there are some deficiencies in the experiments involving the preparation and properties of chlorine gas in chemistry textbooks, such as large amount of reactants, long reaction time, separate reactions and large environmental pollution. Therefore, based on the traditional experiments and the existing improved experiments, the integrated design of chlorine gas preparation, bleaching, acidity, oxidation and other multi-properties test and exhaust gas treatment is not only easy to operate, effectively reduce the amount of reagents, but also has less pollution to the environment, reflecting the idea of green chemistry.

Taking acetic acid as an example, from the qualitative point of view, the dynamic change process of ionization equilibrium under the influence of the common ion effect is explored through color differentiation and digital technology by using liquid film natural diffusion method. The cartoon droplet shows the interest of chemical experiment, and at the same time realizes the visualization goal of wandering particles in the process of ionization equilibrium. The effective integration of experiment and science and technology makes the disciplinary literacy of changing concept and balance thought perfectly manifest, which is suitable for teachers to use in demonstration experiment teaching. But for students’ perception of color is different, also in order to accurately judge the influence factors of the common ion, colorimetric method using digital imaging from quantitative angle, with the help of smart phones and APP for image acquisition, data processing and analysis, finally the experimental results with concise graph rendering, highlight the scientific and systematic high-order requirements of the experiment.

The oxidation of iodine ion and the separation of iodine are the key steps in the separation of iodine from kelp. This paper used the method of reverse reagent addition to improve the iodine ion oxidation process, and used steam distillation to improve the separation of iodine. The experimental phenomenon was obvious, the end point of this experiment was simple to judge, with high separation and less environmental pollution.

The dilution process of dibasic weak acid salt solution was explored dynamically by thermodynamic software of HSC Chemistry. The relationships among particle concentrations and salt concentrations of two typical kinds of dibasic weak acid salt solution including NaHCO₃, NaHS, NaHSO₃ and NaHC₂O₄ were studied by graphical method. The order of particle concentrations in solutions with different concentration ranges was compared conveniently and quickly, which was helpful to clarify the ionization equilibrium process of dibasic weak acid salt solution.

Taking the journal papers on the subject of chemistry concept teaching research supported by hand-held technology digital experiments published in the “CNKI” database as the research object, from the three dimensions of concept selection, application value and application strategy, the content analysis method is used to summarize and discuss the research progress of chemistry concept teaching supported by hand-held technology digital experiment. Finally, based on the existing research analysis, the enlightenment and prospect of research in this field is proposed.

In 1781, the Swedish chemist Scheele discovered tungstic acid in scheelite, which he predicted must contain a new metallic element and named Tungsten. Then in 1783, the de Elhuyar brothers successfully extracted what Scheele said from the wolframite, and named it Wolfram. In 1803, the English chemist Dalton’s atomic theory was introduced, giving a new meaning to the element tungsten: a tungsten atom with a certain mass. After 1930, the discovery of tungsten isotopes led to a new understanding of tungsten element and gradually formed the modern concept of tungsten element. The understanding of tungsten element has gone through a developmental process from hypothesis to objective existence, from qualitative to quantitative, and from macroscopic to microscopic. The evolution of the concept of tungsten element reflects the progress of scientific thought and scientific method.

Starting from reaction mechanism, this paper analyzed organic chemistry questions in the 35th National Chemistry Olympiad Competition (Preliminary), in order to deepen the readers’ understanding of the competition questions, master the methods and skills of answering questions, and improve the learning efficiency.