This paper introduced the characteristics and development of "design and practice of high school chemistry teaching" course for pre-service chemistry teachers in Beijing Normal University, including original one-to-one teaching mode to offline to online teaching mode with examples, and the resources and frameworks of two types of network courses on "icourse" website and BNU MOOC.

Vocabulary of special English of chemistry is generally considered as an obstacle for Chinese learners in interdisciplinary study. This article imported cognitive theories such as meaningful learning, conceptual metaphor theory, category theory, frame semantics into vocabulary teaching of special English of chemistry in order to facilitate students' understanding, create stronger retention of the vocabulary and arouse students' interest.

This paper used coulometric titration to study the changes of Vitamin C (VC) concentration in standard solution and orange juice with the prolongation of storage time in different preservation conditions such as room temperature and natural light, darkness and low temperature, nitrogen environment and adding EDTA, formic acid and EDTA-formic acid respectively. The results showed that the changes of VC concentration were within 5% in a month while the standard solution and the orange juice stored in darkness, at low temperature and in the presence of EDTA, so that errors caused by instability of VC can be effectively avoided.

This article introduced an experimental method for extracting caffeine from teas by automatic extraction apparatus and rotary evaporator, provided an improved sublimation device instead of the traditional method based on funnel evaporating dish, discussed the relationships and differences between modern chemical experimental means and conventional laboratory methods. The new method was useful to understand the characteristics of modern chemistry instruments such as convenient, fast and accurate. The combination of traditional and modern methods could enrich the connotation and technical means of organic chemistry experiment, enhance students' interest of learning chemistry, and therefore achieved good teaching effects.

Students can deeply understand that daily life keeps close contact with chemistry through analyzing nutrient components in teas. Protein and calcium in teas can be detected in their extraction liquid via concentrated nitric acid and calcon in alkaline condition respectively, and iron can be detected in extraction liquid by 3 mol/L hydrochloride via saturated potassium thiocyanate solution.

Experiment of natural diffusion of liquid membrane is the reaction in liquid membrane, in which contrast phenomena of natural and continuous change from reactants to resultants through intermediates can be observed easily and clearly. This article studied the changes of reaction of KMnO₄ and Na₂SO₃ with the acidity and alkalinity of solutions, reactions of FeCl₃ and KSCN, K₄[Fe(CN)₆] and NaOH, the formation process of the complex of Co²⁺ and SCN^- and the phenomena of the diffusion process of litmus solution in acid and alkali solution in self-made drip pans. The experiment is green, simple and less dosage, and its phenomena can be demonstrated by projector or recorded as teaching materials.

Based on practice and experience of bilingual teaching in organic chemistry experiment in the past few years, this paper summarized some problems such as the undefined objective of curriculum, the excessively important position of English and the absence of enthusiasm of students for study, which could be resolved through the elaborate design and strict implementation of experiments.

This paper analyzed chemical knowledge involved in the preparation and standardization of NaOH standard solution, preparation of vinegar samples and determination of total acids in vinegar, which could improve students' ability to analyze and solve practical problems and teachers' teaching levels.

This paper discussed the application of Aspen Plus, a simulation software of chemical process, in analysis of operating problems in distillation experiment of principles of pharmaceutical and chemical engineering. The practice showed that the utilization of process simulation software can make the graphic process and the calculation of distillation experiments more simple, intuitive, accurate, efficient and easy for students to understand, and help to promote the learning initiative of students, deepen students' comprehension of distillation principles, and cultivate students' abilities to solve practical engineering and scientific problems by simulation software of chemical process.

In order to improve students' ability, the chemistry experiment teaching system for chemistry-related specialties have been reformed and practiced. A multi-level, multi-module, named "one main line, two combinations, and three levels" experiment teaching system for the chemistry-related specialties has been initially established in the concept of integrating teaching, learning and research, constructing the virtual laboratory and open laboratory simultaneously, and combining in and out class teaching. Theory application, skills and innovative ability training have been emphasized, experiment contents and organization forms have been enriched, and professional knowledge, practical skills and comprehensive talents have been organically combined, which reflects the characteristics of strong basis and good application in talent cultivation.

This paper designed a comprehensive experiment of green drilling fluid additive preparation using discarded fruit peel, and evaluated the effects of the additives on the drilling fluid performance. This experiment integrates the basic theories, experimental techniques and the field practice of oilfield chemistry, which can improve students' professional experimental skills and abilities of analysis and problem-solving. Using discarded peels as experimental materials can improve students' awareness of environmental protection, and help to put ideas of environmental protection into oil production in the future.

This paper introduced the background and necessity to set up the course "single crystal structure analysis" for graduate students, and elaborated its orientation, contents, teaching methods and assessing system. The teaching practice showed that paying equal attention to theory and practice improved the students' comprehensive quality and single crystal structure analysis ability, flexible teaching methods inspired postgraduates' learning initiative, and multimodal formative assessing system improved the teaching quality.

This paper introduced the application of Gaussian software in teaching of spectrometric identification of organic compounds with example of the IR spectrum of o-xylene. Visualization of molecular structure and molecular vibration by Gaussian software can help students understand molecular space structure, vibration mode, the assignment of absorption peak and innate character of IR spectrum, improve students' interests and initiatives of study, broaden students' insights and knowledge, and develop students' ability to analyze and solve practical problems.

This article analyzed error sources such as the stability of instruments and standard solutions, pararosaniline solutions with different pH and the conditions of chromogenic reaction in the determination of sulfur dioxide in atmosphere by spectrophotometry using formaldehyde and pararosaniline hydrochloride, and provided corresponding solution methods. The combination of practical operation and theoretical analysis can guides students to solve actual problems by professional theories, which is beneficial to the education quality.

In the past decade, a series of technical reports and recommendations were published by IUPAC. In those important documents, many new definitions, nomenclatures, rules, standards, methods were renewed, modified and recommended for chemists all over the world. Those new rules of IUPAC should be introduced to chemistry teaching and applied to chemical research. At the same time, Chinese chemists need to be much more engaged in IUPAC activities and turn from a rule-taker to a rule-maker, so that we can keep pace with the times in chemistry teaching and research.