A Study On The Teaching Practice Based On The Quality Of "Change Concept And Balanced Thought"

Core competencies are being developed around the world tocultivate talents for the 21 st century.The core accomplishment of chemistry is an integral part of the core accomplishment of middle school students,among which the dimension of "change concept and balance thought" is an important part of the cognitive level,which plays a positive role in students' practice based on knowledge and is of great significance to students' comprehensive realization of the core accomplishment.The purpose of this study is to analyze and study the accomplishment of "changing concept and balancing thought" and practice it,hoping to cultivate the accomplishment of high school students.First of all,this study sorted out the current research level and progress of core accomplishment,"change concept and balance thought" accomplishment and PBL teaching mode at home and abroad,looked for the research entrance,and provided theoretical support for the whole research.Then,combing the new curriculum standards(2017 edition)of the connotation of "the ideas of changes and balance",objectives and four level,combining with the teaching material(o 'clock)in chemistry compulsory module and the chemical reaction principle "the ideas of changes and balance",the content of the design before and after test the high school students' ideas of changes and balance "literacy survey questionnaire and test teaching effects.Finally,the PBL teaching mode was adopted to permeate the accomplishment of "change concept and balance thought",and the case design of "calculation of chemical reaction heat","movement of chemical equilibrium","hydrolysis of salt","solution equilibrium of insoluble electrolyte" was carried out,and applied to teaching practice.Overall analysis of the practice effect,so as to put forward the corresponding teaching strategy.The results show that this study has made significant progress on the three components of chemical reaction,namely energy change,chemical balance and limit,and chemical reaction direction,but little progress on the two components of chemical change and chemical reaction rate.Analyze the reasons and put forward the teaching strategies: pay attention to the course standard and make clear the course content;Adopting real problem situational teaching,constantly permeating the core accomplishment of "change concept and balance thought";Make full use of teaching resources and evaluate teaching in many ways.In order to provide the teaching reference to the front-line teachers.The shortcomings of this study lie in the author's limited understanding of the literacy theory of "change concept and balance thought",the designed question questionnaire may not completely cover the whole "change concept and balance thought" accomplishment,the teaching practice time span is short,it is difficult to develop a real accomplishment,which affects the teaching effect analysis.It is hoped that further research can improve its preciseness and enhance the value of this research.