Black tea has become one of the most popular health drinks worldwide due to its rosy soup color and sweet taste. This article analyzes the principles behind the formation of color, freshness, sweetness, and aroma of black tea from a chemical perspective, revealing the chemical knowledge contained in the preparation of black tea, allowing students to experience the charm of chemistry in daily life, enhancing their interest in learning chemistry, and providing authentic materials for organic chemistry teaching.

“Appreciation of Classic Papers in Chemistry” is a freshman seminar course aimed at cultivating scientific research interests and abilities by improving students' understanding of the chemical research and discovery process. This course introduces flipped classroom, adopts online and offline hybrid teaching mode, uses classic papers in chemistry on experiments and theory as raw materials to construct teaching content, and explores the thinking process of chemists in discovering the mysteries of knowledge. The knowledge goals of this course: understand the generation and iteration mechanism of chemical knowledge, and become familiar with the methods of scientific research in chemistry; enable students to master the classification and writing structure of chemical journal papers, and some basic knowledge related to the content learned in chemistry textbooks (such as Lewis electron dot structure, allotropes of carbon, etc.). The ability and literacy goals of this course: stimulate students' interests in scientific research, enhance students' literature retrieval and reading abilities and critical thinking, and cultivate students' abilities to solve problems independently. The construction of this course is explored from the aspects of course objectives, teaching content design, teaching mode, and assessment of students' performances, among others.

In order to enhance the experimental interest and operational ability of undergraduate students, and further cultivate good scientific research literacy and innovation ability, we have designed an innovative experiments based on photocuring 4D printing technology for undergraduates. The experiment adopts digital light processing (DLP) based 4D printing technology which is based on photoinduced free radical polymerization. During the experiment, student can involve in every part of the experiment and experience entire printing process, which is aiming at enabling students to understand the principles of 4D printing, the material synthesis and 3D structure design. At the same time, through innovative design and programming of 4D printing structures, students can not only deeply understand and learn from the design and manufacturing process of deformable structures, but also deformation control mechanism of flexible structures. This approach fosters the experimental interest and improves the material design ability, experimental and practical ability of students, thereby enhancing their enthusiasm and participation in experiments.

The application of large instruments in undergraduate organic chemistry experimental teaching plays a crucial role in enhancing the scientific research literacy and ability of undergraduate students. This article takes the synthesis of n-bromobutane as an example, and combines the practical experience in small class organic chemistry experimental teaching. Through careful design of lesson plans and interactive teaching methods, the utilization rate of gas chromatograph and NMR spectrometer in organic chemistry experimental teaching is improved, and students' interests in learning and operating large instruments is stimulated, and their scientific research literacy and innovative ability is cultivated.

Construction and performance measurement of planar solid oxide fuel cell (SOFC) will be designed as a comprehensive experiment on materials science and engineering for undergraduate teaching, which contains anode, electrolyte, and cathode material preparation, experiment characterization, as well as performance testing based on the SOFC. Through reading literature review, establishing preparation route, synthesizing corresponding material, constructing SOFC, characterizing and testing, the college students can understand the common type of cathode/anode/electrolyte, synthesis and preparation, cell construction, and performance testing methods of SOFC. In the process of teaching design and implementation, taking active exploration of college students should be the main body and the guidance of teachers should be the assistance, so as to exercise students' abilities to search for literature, design experiments, and operate experiments, besides, to cultivate students' innovative consciousness, scientific exploration, and team work spirit.

In the teaching process of comprehensive chemistry experiment, the teaching team introduced the concept of green chemistry and designed an environmentally friendly comprehensive experiment, hydrogen peroxide production by photocatalysis and its content detection including the synthesis of carbon nitride (g-C₃N₄) photocatalyst, photocatalytic production of hydrogen peroxide, and calculation of hydrogen peroxide content. From this experiment, students could understand the cutting-edge field of photocatalysis in chemistry, and simultaneously enhanced their experimental and hands-on abilities, as well as their ability to analyze and solve scientific problems. Thereby a good teaching effect was obtained.

According to the characteristics of the course“High School Chemistry Experiment Teaching Research”, curriculum ideological and political teaching framework based on Scrum mode is constructed from the dimensions of teaching concept, teaching content, teaching methods and approaches, teaching evaluation, and the corresponding design process of teaching content-ideological and political elements-education goals-content design is formed. Taking “fuel cell experiment” as an example, the ideological and political elements are organically integrated into the curriculum education process to provide reference for the curriculum ideological and political construction of teachers' major.

Value-added assessment of student learning is a form of assessment that focuses on the starting point of student development and learning, and makes value judgments about learning growth based on the starting point.The value-added assessment model of student learning based on knowledge graph is constructed according to the general process of educational assessment,including five links:creating knowledge graph for three-dimensional assessment of knowledge-skills-literacy,measuring student learning behaviors,calculating the value-added of student learning by knowledge graph and residual model,analyzing value-added of student learning,and giving feedback on the results and improving teaching.The acid-base titration task is used as an example to validate the implementation process of the value-added assessment model of student learning and to provide a reference case for the implementation of value-added assessment of student learning in vocational education.

Practical training is an important part of cultivating the talented persons in pharmaceutical and chemical engineering in higher vocational colleges. In order to overcome the disconnection between traditional chemical engineering practice teaching and the actual production status of enterprises, we introduced the detailed process of building a semi physical simulation factory including eight process such as nitrification, fluorination, and cyclization, using norfloxacin raw material production as a model carrier, relying on information technology and 3D factory simulation technology. Air, water and neutral solid particles were used to replace real materials. The application of this simulation factory in the integrated teaching practice of theory, virtuality, and reality had achieved good educational results.

For better teaching the theory of “adsorption of particulate matter in water” in undergraduate environmental chemistry course, this paper discusses the application of cutting-edge scientific research and advanced technology to explain classical adsorption theory, expand the knowledge points of course, cultivate innovative thinking, and stimulate students' interests in scientific research and application challenges by case study. Based on integrating the teaching material outline and frontier research in “four steps teaching design”, we aim to specify and visualize the knowledge point, in order to promote students' understanding and improve their scientific literacy.

Based on the characteristics of medical organic chemistry course, intelligent teaching platform learning pass is introduced into traditional teaching classroom. Under the teaching concept of guiding values into knowledge imparted and ability cultivated, this paper applies the blended teaching mode integrating ideological and political content into the teaching of medical organic chemistry, breaking through the limitation of time and space in learning and creating an interactive and active classroom teaching. It increases the humanistic charm of the organic chemistry course and realizes the synergistic educating effect of ability, accomplishment and professional knowledge.

In view of the shortcomings of the traditional experimental teaching of formation oil properties test, combined with the needs of new engineering and double first-class construction to improve the breadth and depth of experimental courses, the experiment of formation oil property change with the injection of CO₂ and chemical agent under “Dual-Carbon” background is designed. Digital teaching resources such as “experiment basis”, “experiment operation” and “experiment safety” are developed. And based on the digital resources, three levels of experimental content of experiment scheme, parameters test and experiment result analysis are designed. The practices show that students can not only master the whole process of formation oil property test in limited class hours, but also explore the law of formation oil property change with CO₂ injection and evaluate the effect of the chemical agents. The experiment enables students to understand the professional knowledges in depth and improves their practical ability to solve complex engineering problems. Meanwhile, the experiment stimulates students' research interest in the utilization and storage of CO₂, playing a positive role in the building of college carbon-neutral talent training system.

Graduate teaching assistants can achieve a “triple win” among teachers, teaching assistants, and students, which has a positive significance in improving the quality of experimental teaching and cultivating the comprehensive quality and ability of graduate students. This article, from the perspective of a doctoral teaching assistant and based on personal teaching experience, defines teaching assistant work with the characteristics of catalysts. It is hoped that it can provide useful reference for the reform and innovation of experimental teaching and the improvement of the comprehensive quality of graduate teaching assistants.

ChatGPT is introduced into the material simulation and design classroom. By using the features of ChatGPT, such as convenient operation and high performance, high-level classroom teaching is realized through teaching reform. ChatGPT is used for assisting both theoretical knowledge teaching and software practical operation to realize efficient learning and application of material simulation, cultivate students' learning ability, improve students' interest in computational materials science, and let students understand computer technology as a learning and scientific research tool.

Nucleophiles and primary haloalkanes generally take place bimolecular nucleophilic substitution. However, the reaction of chloromethyloxirane (epichlorohydrin) and nucleophiles first undergoes a nucleophilic ring opening of its oxirane followed by an intramolecular nucleophilic cyclization, affording final products, rather than nucleophiles directly displace its chlorine atom to give the final products. The reason is that the banana bond for the formation of small ring compounds does not overlap axially. The overlap is not efficient so that the stability of the banana bond is weaker than that of the axially overlapped bond in other compounds. Thus, nucleophiles first attack the weaker C—O σ-bond in oxiranes, the generated alkoxides further undergo an intramolecular nucleophilic cyclization, affording the final products. The reactive differences of chloromethyloxirane and primary haloalkanes are rationally explained through analysis of the forming orbitals and stabilities of the crucial chemical bonds in reactants. It would provide a deeper understanding for students.

A brief introduction to the photoselection rule of electron transition in analytical chemistry textbooks is a favorable supplement to the knowledge points of selective absorption in current textbooks. It is beneficial for students to have a more comprehensive understanding of the principles of electron absorption spectroscopy, which is in line with the current development trend of analytical chemistry and also meets the needs of the national consolidation foundation programs aimed at selecting and cultivating top-creative-talents in basic disciplines. Considering the mathematical and physical proficiency of undergraduate students in their first or second year, as well as the possibility that some students may no longer be exposed to the basic theoretical course of electron absorption spectroscopy in the future university studies, it is suggested to introduce the photoselection rules of electron absorption spectroscopy in chemical analysis and instrumental analysis courses in a hierarchical manner. And it is recommended to provide only qualitative and non-mathematical descriptions, while also providing further reading materials for the sustainability of learning.

How to optimize the open training management system, improve the utilization efficiency and also give full play to the potential of large-scale instrument as high-quality scientific research and teaching carrier, is a common topic faced by university public service platforms. In light of the current situation and existing problems of the Instrument Analysis and Testing Center in our college, X-ray photoelectron spectroscopy is first taken as an example to develop a new training and opening system and mode to realize those aims. According to XPS characteristics and fully relying on the current opening management software and hardware conditions of the platform, such system and mode is characterized by differentiated and complementary instrument utilization, user classification, user online and offline training combination and multi-level training management. Further, the assistant tester system, customized service and the experimental case database construction, are selected as emphases to push scientific research back-feeding to teaching and teaching to promote scientific research. After several years of operation,this system and model has been proved to significantly reduce man-made fault, ensure long-term and normal running and thus achieve full-time opening, simultaneously increase the quantity and quality of resulted test data and published papers, and improve the quality of talent cultivation. While promoting the integration of science and education, it also provides reference and experience for other large instrument management.

In the context of the “Great Ideological and Political Course”, the development and utilization of industrial heritage, such as the establishment history of Yongli Ammonium Plant, offers a fresh perspective on integrating ideological and political education into STEM courses. According to the historical background, the acquisition of the right to undertake, the preparation process, and the establishment of Yongli Ammonium Plant by pioneering figures in the Chinese chemical industry, such as Fan Xudong and Hou Debang, it's evident that the plant played a crucial role in establishing China's basic chemical industry and paved the way for advancements in the fertilizer and synthetic ammonia sectors. This establishment not only laid the foundation for the country's industrial supply chain but also safeguarded national agriculture and defense. The plant vividly embodies the deeply ingrained Chinese cultural values of self-improvement and unwavering nationalistic sentiment. Additionally, it reflects the sense of responsibility for the nation's rise and fall, the brave scientist's spirit, and the unwavering commitment to perfection. Based on these historical materials, significance, and spirit, the construction of ideological and political education in STEM courses aligns with the objectives and requirements of curriculum-based ideological and political education in universities. Furthermore, it can widely inherit and promote the spiritual value of industrial heritage, and help to enhance the affinity and synergy of ideological and political education.