Promoting The Development Of Students’ Model Cognitive Literacy Research On The Improvement Of Chemical Modeling Teaching Action In High School

Modeling teaching is a teaching paradigm that continues to develop with the deepening of people’s understanding of models and modeling,and is an effective way to promote the development of students’ model cognitive literacy.However,in actual teaching,there is a lack of in-depth classroom modeling teaching practice research,and the combination of model cognitive literacy and modeling teaching practice is urgently needed.In view of this,it is very necessary to deeply integrate modeling teaching and model cognitive literacy within the classroom.This study attempts to build a unit teaching mode based on model construction.Taking the unit teaching of “chlorine and its compounds” as an example,based on the idea of Ebbart’s action research,classroom observation,test and interview methods are adopted to improve the modeling teaching action to promote the development of students’ model cognitive literacy.Firstly,on the basis of sorting out and summarizing the existing research results,a unit teaching mode based on model construction is formed.Secondly,based on Professor Wang Lei’s theoretical research on chemical discipline competence in the topic of inorganic compounds,a framework for assessing the cognitive literacy of chlorine and its compounds models was constructed,and evaluation tools were developed based on the Rasch model.Thirdly,taking the students of Class 1 and Class 4,Grade 1,X Middle School in L City,Gansu Province as the implementation objects,based on the pre-test analysis and the overall discussion of the unit teaching design,the unit teaching improvement is carried out to promote the development of students’ model cognitive literacy.Finally,it examines the development of students’ model cognitive literacy,analyzes the effectiveness of teaching improvements,and puts forward suggestions for effective modeling teaching.The research shows that,firstly,the overall improvement of unit teaching based on model construction has a good effect and can promote the development of students’ model cognitive literacy.Before and after teaching,the cognitive literacy level of students’ models has developed from near level 1 to near level 2,which means that students can demonstrate the relevant properties of materials based on the perspective of material categories and elemental valence.Before and after the teaching improvement,the development level of students’ model cognitive literacy in Class 1 is higher than that in Class 4.54% of students in Class 4 are at Level 1 “understanding model”,24% are at Level 2 “application model”,while 32.69% of students in Class 1are at Level 1,and 30.77% are at Level 2.Secondly,based on the process of teaching improvement,explore the combination of modeling teaching and model cognitive literacy in the teaching of elements and compounds.Starting from the model elements,combine the existing thinking models of students,integrate specific knowledge content,comprehensively analyze various substances and properties,and pay attention to the design of teacher-student dialogue and questioning activities and teaching tasks.Thirdly,through the implementation and improvement of 4-hour teaching based on model construction,the following suggestions are proposed for effective modeling teaching:combining modeling teaching theory,analyzing the curriculum and learning situation,and conducting secondary development of textbooks;Emphasize the creation of real situations and the application of sensory models;Emphasize the design of exploratory activities and highlight the modeling process;Focus on teamwork and interaction,and understand model elements.