Study on the classification of situational materials in the module of"material structure and properties"based on multidimensional scaling and cluster analysis
In order to systematically explore the content structure and classification of the situational materials in the"Material structure and nature"module,this paper selects 35 situational materials through text research and questionnaire survey based on the curriculum standards and Optional Com-pulsory Course 2 for Human Education Edition.Taking the first-line chemistry teachers of middle school and the undergraduates and postgraduates of a normal university as the research subjects,the multidimensional scaling method was used to explore the content dimensions of 35 situational materi-als,and the classification of situational materials was further determined by systematic clustering method.It is found that the contextual material content of the"material structure and properties"module presents a three-dimensional distribution of"frontier/historical facts","life/scientific re-search"and"chemistry/interdisciplinary",which can be specifically divided into 6 categories:social life,academic inquiry,science and technology frontier,simulation association,scientific historical facts,and practical exploration.The research can provide reference for scholars and teachers to carry out effective research and practice of situational teaching.
classification of situational materialsmaterial structure and propertiesmultidimensional scaling methodcluster analysis method
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