The 15th question in Anhui senior high school entrance examination chemistry paper in 2018 as an example, this paper analyzed the characteristics of questions and how to reflect the test purpose of discipline literacy from the factors such as situation, knowledge, and problems of the test questions. Then this paper made a reflection on the selection of context materials and the design of problems.

While setting the simulation test questions,teachers generally chose chemical scientific papers as the background material. This paper analyzed the basic situation of process flow chart of sixteenth question of chemistry of college entrance examination in Jiangsu province in recent three years,expounded the setting strategy of high school chemistry test questions using scientific papers as materials from the following four aspects:selecting the appropriate background material; translating the text skillfully into the process flow chart; establishing a link between background materials and test questions; designing test questions carefully. According to the practical experiences,we put forward the attention point of the examination questions.

This paper established the model with 2 dimensions of the 8 aspects of "science and engineering practice" and learner's subjectivity,analyzed the practical activities in high school chemistry textbooks published by Shanghai Science and Technology Press,and found that this textbooks paid great attention to the practice of analysis,gave full play to students' subjectivity to analyze and interpret data better and scientifically,and to model,plan and implement investigations in engineering practice. But on the whole,the engineering practice was seriously insufficient. No matter the scientific practice or the engineering practice,the students were too passive in asking questions and designing steps. Therefore,we should strengthen the initiative of students in the revision or teaching optimization of chemistry textbooks,in addition to carrying out scientific research activities,we should also appropriately increase the activities of engineering design.

Based on the teaching cohesion in organic chemistry between senior high school and university, this paper summarized the teaching feedbacks from 296 students of 6 majors including 10 classes in 2015-2017, discussed the problems existing in organic chemistry teaching between senior high school and university according to the statistical analysis on current teaching contents and methods, and put forward some suggestions. The results could have the practical significance for the clarification and normalization of scientific concepts, the rationalization of curriculum, and the improvement of teaching effectiveness.

The Next Generation Science Standards(NGSS) in United States stressed the importance of scientific practice and put forward key elements of science and engineering practice, not only provided the direction for the concrete implementation of scientific practice, but also made the evaluation criterion of scientific practice more explicit. This paper introduced the framework of NGSS science and engineering practice. Taking the influential factor on chemical reaction rate as an example, this paper analyzed the reflection and implementation characteristics of key elements of science and engineering practice in teaching, put forward the reference and enlightenment for the design of chemistry teaching process in high schools in China.

This paper designed teaching with the aim to help students to construct "substance inspection" thinking model autonomously. Through finishing the inquiry tasks of "substance inspection",students could construct thinking model autonomously and form complete ideas,and could improve the ability to solve such problems. This paper carried on the teaching practice in the third grade in a junior high school in Beijing,and tested the effects of teaching practice. According to the teaching practice,this paper summed up the effective teaching strategies of constructing "material testing" thinking model:selecting materials based on modeling process and life situation; constructing the thinking model of "substance inspection" independently with students as the center,and guiding students to experience a various of thinking development process; students experienced model construction at different levels.

This paper conducted classroom inquiry activities on a practical problem in the teacher's daily life, revealed the reasons for the disappearance of purplish red pigment in steamed twisted rolls with red pitaya juice. In the process of autonomous, cooperative, open and in-depth learning, the class cultivated student's problem consciousness and inquiring abilities, and aroused their curiosity as well as inquiry interests of problems related to chemistry. During the process of practical problems solving, the class developed students' chemical thinking methods and discipline core literacy.

This paper used multifunctional combination U-tube to design an innovative experiment, exploring the factors affecting chemical reaction rate, which improved students' experimental ability and enhanced learning interest. Under the guidance of WWHW epistemological thinking model, this teaching design helped students construct the relevant knowledge about chemical reaction rate by themselves, and deepened their understanding of knowledge and scientific nature of chemical reaction rate.

In the process of learning elements in senior high school,the interaction of the compounds (aluminous triangle) involved 7 reaction equations,belonging to college entrance examination high frequency examination point. Because most of the students' cognition was on the memory level,the mutual transformation relationship of aluminum was more chaotic for them. Started from a college entrance examination question,this paper designed 4 solution titration experiments with digital hand-held technology,using conductivity,pH sensor to gain the curves of conductivity and pH with time,combining macroscopic,microscopic,symbolic and curvilinear characterization multi angle to analyze. Four dimensional characterization analysis methods were utilized. The purpose was breaking through the double hydrolysis reaction equation and providing some reference suggestions to improve the teaching of aluminum,enriching the case of hand-held technology in teaching.

Taking "burning of candles in an Acrylic container" as a building fire simulation system and using hand-held technology, this paper presented the real-time changes of oxygen content, carbon dioxide concentration and temperature at different heights of the Acrylic container, and presented the corresponding curves. Through the in-depth analysis of the information contained in the curves, the rationality of key escape strategies in the event of building fire was effectively explained, intensifying the understanding of "combustion and fire suppression" of primary and high school students and contributing to improving people's fire awareness and survival skills in real life.

Used hand-held technology,this paper measured the surface temperature in different positions of asbestos wire gauze in heating instantaneously and accurately. Independent sample t test was employed to compare the temperature and the difference in temperature between the two types of characteristic points on surface of the asbestos wire gauze. The relationship between the surface temperature and its influence factors was explored with regression analysis. The results showed that:there was a highly significant difference on temperature between the two types of characteristic points under the same conditions,and there was no significant difference on difference in temperature per unit distance between the two types of characteristic points under the same conditions; the relationship among the surface temperature,time and position during rising temperature process might be fitted as a linear equation with two unknowns,and the relationship between the surface temperature and position in constant temperature period might be fitted as univariate cubic equation; the surface temperature decreased slightly from the center to the edge,evenly distributing,the maximum temperature difference was less than the temperature change that glass device could withstand. The results could provide a quantitative reference for utilizing asbestos wire gauze effectively and rationally,and compiling chemistry experiment teaching material in chemistry education practice.

In the high school chemistry,VSEPR model is used to construct the structure of particles from the macroscopic and the whole angle. Using valence basis point of view,this paper analyzed and assembled the Lewis structure from the microscopic level,which had been applied in several typical molecules.