Practical Research On The Cultivation Of High School Students’ Chemical Thinking About Particle Reaction View From The Perspective Of Core Literacy

Chemical thinking is the key factor of chemical development and research and the premise of transforming chemical knowledge into the core accomplishment of the subject.The theory of particle interaction is a basic chemical concept with a high generalization degree,integrating knowledge,thinking and value orientation.It systematically interprets the principles and laws of interaction between particles that constitute substances from macroscopic and microscopic,qualitative and quantitative perspectives.The new curriculum standard and the new college entrance examination pay attention to the examination of chemical thinking.It is necessary to sort out the thinking value of core chemical concepts such as the view of the action of particles and carry out corresponding teaching practice.Scholars at home and abroad have a wealth of theoretical studies on the theory of particle action and chemical thinking,and preliminarily confirmed that the theory of particle action has a certain value of thinking.The key to the cultivation of microparticle view is to emphasize the hierarchy and systematization of corresponding concepts and research methods from the perspective of concept as a whole.In this study,the meaning and hierarchical structure of the view of particle action and chemical thinking were defined by the method of literature research,and it was proposed that the view of particle action was closely related to five kinds of chemical thinking,namely macro-micro thinking,chemical model thinking,chemical conservation thinking,chemical system thinking and innovative thinking.Combined with the text analysis of the new curriculum standard under the background of particle effect view "academic requirements,chemical thinking and core literacy" relationship;By summarizing the examination of the thinking corresponding to the theory of particle action in the national paper of College Entrance examination in recent two years,it is found that: in the real situation,multiple chemical thinking related to it is often examined for specific content;To construct the thinking ability system of particle action view suitable for the integration of "teaching,learning and evaluation".Through literature research and teacher interviews,it is determined that the cultivation of correlational view of thinking needs to pay attention to the visualization,hierarchy and systematization of the teaching process,and combine classroom teaching with extracurricular practice.On this basis,strategies and methods for the cultivation of correlational view of thinking are proposed.The unit teaching program of "Electrolyte ionization" and "Chemical Bond(Class 1,Class 2)" was designed,and the pre-test and post-test papers were used to cultivate the teaching practice of particle action view thinking,and the overall quality of the papers was analyzed.By means of questionnaire survey,the development of students’ chemical thinking was evaluated from three perspectives: the total score from the first test and the score from the second test,the score from different chemical thinking levels and the score from different thinking levels.It is found that the unit teaching of "chemical bond",which carries out the cultivation of microparticle view thinking,can give full play to its advantages in the aspects of chemical model thinking,chemical system thinking and application of high-level chemical thinking ability,so as to solve chemical problems.In addition,it can guide students to attach importance to the connection between chemical knowledge and chemical theory in the process of solving problems related to the action of particles,and analyze problem elements by combining information context,image and model,so as to improve their problem-solving ability.