A Case Study Of Conceptual Representation In High School Biology That Promotes Conceptual Understanding

The presentation of high school biology knowledge is mainly in the form of concepts.The newly revised " Curriculum Standards of Biology for Senior High School "(2017 edition.2020 revision)clarifies that the training goal of senior high school biology is to improve the comprehensive quality of students and focus on the development of core literacy.It emphasizes that the content of the course in the teaching focuses on big concepts,and promotes students' understanding and application of concepts through concept teaching.According to the students' cognitive characteristics and the related theories of conceptual representation,the research on how to represent concepts is important and necessary.The research work of biological concept representation to promote concept understanding.On the one hand,through literature analysis and summary of the form and characteristics of concept representation,the following problems are found(1)Unskilled extraction of keywords;(2)The ability to convert between the representational forms of concepts is weak;(3)Lack of a systematic conceptual framework.On the other hand,based on the theory of dual coding theory,multimedia learning cognitive theory,and cognitive load theory,the teaching design ideas of conceptual representation are constructed.At the same time,the questionnaire survey method is used to investigate the students' conceptual understanding,and then at the practical level,the teaching of "the main bearer of life activities-protein" is used as an example to test the teaching effect with the contrast experiment method.The results show that enriching and optimizing the representation form of concepts can enhance the ability of representation transformation,promote the connection between knowledge points and knowledge points,and improve students' understanding of high school biological concepts.The use of teaching strategies such as "using multiple representations to present teaching content,constructing conceptual models to organize cognitive frameworks,and creating problem situations to apply representational transformations" can effectively help students establish a complete cognitive framework and promote conceptual understanding.