A Practical Study On The Application Of Model Method In The Teaching Of "Metal Crystal And Ionic Crystal" In High School Chemistry

Cultivating students' scientific literacy is the general goal of the new chemistry curriculum in senior high school.The model method is a method to reveal the characteristics and essence of the prototype through the study of the model.The model is vivid and intuitive.In the process of learning chemistry by the model,middle school students can improve their ability to analyze and solve problems.However,as a kind of important scientific method,model has not been used and paid too much attention in teaching,and students generally have no awareness of modeling.In this paper,the teaching practice of "crystal structure and properties" in high school chemistry is carried out.This paper studies the teaching of model method in crystal structure from theory and practice.This paper defines the core concepts of model and model construction,analyzes the teaching status of "crystal structure and properties",the theoretical basis of model and model method,and the application of model method in teaching.Before the implementation of the teaching is aimed at "crystal structure and properties of" teaching method,model,teaching attitude to interview of teachers,design the questionnaire on students' knowledge of crystal structure of the difficulties in investigating and analysis,selecting two classes results quite for model method in the teaching practice,try to use physical model,mathematical model and thinking model is applied to the metal crystal "and" ionic crystal "teaching.The data analysis of students' teaching practice before and after the test shows that the teaching effect is remarkable.The teaching of model method is conducive to improving students' interest and confidence in learning chemistry,as well as their spatial imagination and modeling ability.