Practical Research On Chemistry Modeling Teaching In Senior High School

Modeling is an important practical method of chemistry learning,and it is also an important means to implement the chemistry core literacy of "General Senior High School Chemistry Curriculum Standard(2017 Edition)" and change teaching methods.Chemical modeling plays an important role in helping students to construct knowledge system independently and break through the important and difficult contents of disciplines.In view of the fact that there are still many gaps in the practical research of chemical modeling teaching,after two months of teaching practice,the paper explores the theoretical model and practical effect of the integration of modeling teaching and high school chemistry teaching initially,hopes to provide reference for the application of modeling theory in chemistry teaching and takes "Chemical Equilibrium Principle" as the teaching content through literature research,investigation and interview,teaching practice and other means,which is based on the requirements of the times of science education,the implementation of core literacy and the realistic requirements of changing teaching methods.This paper mainly consists of five parts:The first part: the research background,significance,methods and ideas of the paper are mainly introduced to provide background support and method guidance for the research of the paper.The second part: the literatures of the research status of model construction and chemical equilibrium principle at home and abroad are reviewed from different perspectives with the method of literature research.The third part:this part defines some relevant concepts and explains the theoretical basis of the research.On the basis of the existing theoretical research,four aspects of modeling are proposed: selecting and describing the model,initiallyestablishing the model,effect and application of the model,and evaluating and adjusting the model.At the same time,a modeling teaching mode is proposed according to the aspects of model construction in combination with the features of chemistry discipline,and the specific process implementation is explained.The fourth part: the current situation of chemistry model construction teaching in senior high schools is investigated with the investigation method before teaching practice.The results show that teachers know theory knowledge but neglect practice,while most students do not know modeling.The results of the investigation provide background materials for teaching practice research.The fifth part: the teaching design is carried out basing on the modeling teaching mode,taking "chemical equilibrium movement" and "ionization equilibrium of weak electrolyte" as examples,to implement comparative study of modeling teaching practice.The practical effect is tested with comparative analysis from the aspects of students' chemistry learning performance changes and students' oral reports.The research results show that the four-steps chemistry modeling teaching mode is more scientific,effective and reasonable,with better consideration to the content characteristics of chemistry,the development requirements of chemistry core ability and the improvement of students' academic level.Chemical modeling teaching can effectively help students break through the important and difficult contents of chemical equilibrium principles,help students better integrate chemical equilibrium knowledge,establish a more complete knowledge framework,develop high-level thinking ability,and improve students' chemical performance and problem-solving ability.