Design And Practice Of Chemistry Teaching Based On "Model Cognition"

The "General Senior High School Chemistry Curriculum Standards"(2017 edition)proposes the core literacy of chemistry disciplines.Among them,“evidence reasoning and model cognition” is one of the five core literacy,Affirmed the important role of chemical model teaching in chemistry teaching.This study is based on the construction of chemical substance model teaching,defining the different levels of model cognition and model cognition;Systematic analysis of the models in the textbooks and the textbooks of the middle school chemistry textbooks,statistics and 3D model animation of the chemical substance models in the textbooks,and preliminary establishment of the middle school material model animation library;Through the teaching design of the model,the understanding model,the application model and other strategies in the teaching,the actual teaching and evaluation research is carried out,in order to provide reference for the teaching and design of the middle school chemical model teaching.Taking this as the main line,the main contents of this study are as follows:The first part: through the model cognitive requirements proposed in 2017,the application of the model in the actual teaching and the importance of the model in chemistry teaching,the research content,research purposes,methods and ideas of this research are proposed.The second part: combined with the existing research on model cognition at home and abroad,defines the core concepts such as “model” and “model cognition level” of this study,and briefly describes several theoretical foundations of this research.The third part: Based on the definition and analysis of the above concepts,the material model of the junior high school and high school chemistry textbooks of the PEP is calculated and constructed,and the construction process of the 3D model animation is briefly described.The fourth part: This study selects three cases based on model teaching from junior high school and high school chemistry teaching,and teaches design for three cases.Each case selects one experimental class to conduct a practice class and pass the model cognitive level test.The model’s cognitive level test questions and questionnaire survey methods were used to evaluate the practical effects.The fifth part: summarizes the whole research,reflects on the inadequacies of this research,and mirrors the research on the core literacy of students’ "model cognition".