The Research Of Chemistry Model In Junior Middle School Chemistry Teaching

Chemical models are a bridge between chemistry and the real world.Chemical model can help students to systematically learn knowledge content,cultivate students ’ability to solve practical problems with chemical consciousness,and in the process of modeling,students’ innovative consciousness can also be improved to a certain extent.At present,most of the research on chemistry model teaching in middle school is concentrated in high school.However,as a common and important scientific thought and method,junior high school also has many contents related to models.Therefore,appropriate methods should be adopted in teaching to let junior high school students form a certain understanding of the model and improve their own scientific literacy.This paper mainly carries out research from the following aspects: First,taking the construction of chemical model in chemistry teaching in junior middle school as the main research line,the literature review and arrangement of model,chemical model,model construction and other related concepts,and analyzes the teaching and research status of chemical model at home and abroad.Second,the questionnaire survey,on the basis of previous research modification and compiled the student questionnaire,the survey analyzes the students in the chemical learning model attitude and the present situation of junior middle school chemistry modeling teaching,and adopt the interview method survey junior middle school chemistry teachers to cultivate students’ chemical model cognitive ability attitude and teaching methods,find out the problems existing in the teaching and the insufficiency.Then,based on literature combing and investigation and analysis,the junior middle school chemical model is divided into three categories,including matter model,thought model and symbolic model.The teaching paradigm of chemical model construction is put forward,which mainly includes six processes: creating the situation to clarify the modeling purpose,selection and perception model,understanding and construction model,testing and evaluation model,correcting and establishing model,and application model.Three teaching strategies are proposed after studying the construction of chemical model.Finally,specific teaching cases were designed and implemented.Based on the teaching paradigms and strategies,after the teaching practice in the internship middle school,the teaching practice results were qualitatively analyzed by means of classroom observation and student interview,and the chemical results of the experimental class and the control class were quantitatively analyzed by SPSS25.0 software.Explore the influence of chemistry model method on students’ interest,attitude,thinking mode and other aspects.Studies have shown,The students in the experimental class have made significant progress in chemistry,Compare the scores of the students in the two classes,The experiment before the learning level of the two classes is basically the same,There was no significant difference,And the experimental analysis data can find that the experimental class is significantly higher than the control class,Chemistry model teaching has a significant effect on the development of students’ model cognitive ability;In addition,through classroom observation and interviews,students’ interest in learning chemistry has improved significantly,The way of thinking about learning chemistry has also changed somewhat,At the same time,teachers also reflect on the certain limitations of traditional teaching methods,Realize the importance of chemistry model in chemistry teaching in junior high school.It is hoped that the research of this paper will be helpful to the model teaching research of junior middle school chemistry teachers,and can also provide some inspiration and reference for more educational researchers.