Experiments proved that the solution of colloidal gold often appeared deeper color and low penetrability after reacted with swill-cooked dirty oil. Colloidal gold could be used to test and distinguish cooking oil from cooked oil qualitatively.

Chemical core literacy had triple implications of "chemical" literacy, "core" literacy and "human" literacy. Based on the concept analysis and hierarchy analysis, this paper proposed four-dimensional structure model of chemical core literacy. Among the four dimensions, "chemical basic concepts" was fundamental, "the process of chemistry" and "the applications of chemistry in life" were two activated dimensions while "the attitude towards chemistry" was the dynamic dimension. Chemical core literacy had laid the foundation for the development of academic chemistry literacy and life-oriented chemical literacy. Grasping the differences in the structure and the specific dimensions of the three kinds of chemical literacy could help to understand the connotation of chemical core literacy, and also help to grasp the teaching orientation of different modules in the high school chemistry curriculum.

Taking senior high school chemistry as an example, this paper combined bilingual teaching with mini course based on the specific circumstances of the selected schools, made the ideas and goals of the mini chemistry curriculum for bilingual teaching in senior high school, followed scientific principle, expanding principle, principle of cultural blending and interesting principle to select teaching contents. Through a variety of ways to organize the teaching contents, namely through the second theme overall the content of each chapter, this paper tried to use a variety of ways to present chemical history, actively emphasized the importance of scientific experiments, and guided students to think in a English way by questions aside, paid attention to the reading experiences which were brought by the typesetting of pictures and letters as well as the textbook itself etc. And this paper chose a four star high school in Suzhou to carry out bilingual teaching of the micro chemistry curriculum, and carried out the internal evaluation and effect evaluation.

Based on experiment teaching experiences of AP (Advanced Placement) chemistry and our national general high school chemistry, this paper compared the curriculum standards of these two curricula, analyzed their similarities and differences by taking the specific experiment "identifying unknown compounds by qualitative analysis" as an example, and provided some references for the front-line chemistry teachers and domestic high school chemistry teaching in the future.

Taking "the design of interesting primary battery" as an example, this paper selected the first grade students in one shanghai senior high school as the research object, introduced the design and implementation of the experimental homework based on the video-recording, and used PTA (Primary Trait Analysis) scale to evaluate the performance which could strengthen students' understanding of chemistry theoretical knowledge and improve their comprehensive experiment ability of chemistry.

This paper selected two classes as experimental subjects based on quasi-experimental design. The experimental group was treated using explanation-driven inquiry to learn electrolyte and oxidation-reduction reaction, while control group was on school schedule by their own teachers. The results showed that the experimental group students had higher scores on concept understanding assessment, and had significant difference in understanding concept of oxidation-reduction reaction. The conclusion was that explanation-driven inquiry could effectively promote students' understanding of chemistry concepts, and eliminate students' some misconceptions.

In order to complete the task of teaching, teachers would ignore the development of students' higher order thinking. Although this could complete the teaching objectives timely, but the teaching effect would be greatly reduced, and more importantly, it would directly hinder the development of higher order ability, such as innovation, critical thinking, acquirement of tacit knowledge, self management, etc. Higher order thinking needed the support of higher order learning scaffold. This paper discussed that the application of "advance organizer scaffolding based on mind map" in different classes could help students to participate in complex cognitive activities, to establish higher order thinking model and enhance the meta-cognitive level.

This paper analyzed the main factors that affected the classroom teaching behavior of chemistry teachers from the perspective of the teachers' demographic variables and their personalities used the questionnaire to investigate the characteristics of classroom teaching behaviors and the basic information of 20 junior high school chemistry teachers such as age, educational background and personality and so on. Data were processed by F test, multidimensional scaling and other statistical methods. The results showed that there were significant differences in teaching behaviors of chemistry teachers and the main influencing factors were genders and personalities. Furthermore, this paper analyzed the different characteristics of teacher's teaching behaviors in different genders and personalities and tried to introduce the multidimensional scaling method to reveal the influencing factors of the differences in teaching behaviors of chemistry teachers.

This paper designed 6 experiments to explore corrosion rates of metals at anode of electrolytic cell and negative electrode of primary cell using hand-held technology, and converted the metal corrosion rates to gas production rates when metal corroding, which further converted to the change of pressure in a closed system within a certain time. The key of these experiments was measuring the change of pressure by the pressure sensor. This paper got the pressure-time variation data and analyzed the reaction rates according to the slope of the curve. Moreover, this paper presented and analyzed the curves from the point of view of quadruple representation "macro-curve-micro-symbol" in order to help students to understand the experimental process.The conclusions were:(1) in the same electrolyte solution, the corrosion caused by the electrolytic cell was faster than the corrosion caused by the primary cell; (2) generally in the same electrolyte solution, for a certain range of concentration, the higher concentration of the electrolyte solution, the faster of corrosion.

In order to illustrate the chemical principles behind the fluoride toothpaste which could prevent dental caries, this paper designed digital experiment by using egg shells instead of teeth.This paper used conductivity sensor to study the dissolution equilibrium of egg shells, and applied gas pressure senor to study whether the egg shells blistered by the fluoride toothpaste had the ability of resisting acid or not. Moreover, this paper used the linear fitting function of Logger Pro to get the reaction rate curve of egg shell and hydrochloric acid, and indicated the limited protection time of fluoride ion. Finally, the cause of the phenomenon was also analyzed theoretically.

This paper studied the aqueous solution of sodium dodecyl benzene sulfonate using handheld technology, the results showed that the emulsifying ability could be reflected by the decreasing rate of conductivity. Moreover, this paper determined the oil degreasing ability of different detergents by adding vegetable oil and comparing the decreasing rate of conductivity of emulsion using conductivity sensor.

This paper effectively improved the experiment of "effect of manganese dioxide in the reaction of preparation of oxygen by decomposing hydrogen peroxide", provided necessary chemistry experiment support for establishing correct catalyst concept and highlighted the empirical value of chemistry experiment.

This paper used the orthogonal experimental method to explore the external factors affecting sodium bicarbonate crystal precipitation, such as volume of saturated sodium carbonate solution, experimental temperature, inside diameter of test tube, flow rate of carbon dioxide and so on, obtained optimum experimental conditions for sodium bicarbonate crystal precipitation in classroom. This optimized experiment can produce a clear white turbidity in about 5 min.

Based on the abnormal phenomenon of bubbling on zinc electrode in the copper-zinc primary battery, this paper explained the reason through the analysis of working principle of different types of primary batteries, put forward some opinions on how to deal with the difficult problem in teaching, then suggested that the high school chemistry textbook should clearly described the phenomenon of bubbling on zinc plate.

This paper took several Olympic chemistry competition questions in recent years as examples, solved questions with the aid of the solution equation and the equation group, statistics as well as the form function in calculator, such as questions related to ion concentration calculation, analytical chemistry, determination of reaction order and indefinite equation group, and reflected the calculator's convenient, fast and accurate performance.