Research On The Development Level Of High School Students’ Chemical Structure Idea

Material structure is an important content of secondary school chemistry courses,and the construction of chemical structure is particularly important for developing students’ core literacy in chemistry.This study aims to construct a framework for the observation and evaluation of chemical structure,evaluate the development status of chemical structure idea of high school students,and provide theoretical basis and teaching suggestions for the construction of chemical structure idea of middle school students.Based on the existing theoretical research on chemical structure,this study first defines the connotation of chemical structure idea of middle school students based on the connotation analysis of chemical structure.It is a fundamental view of the relationship between the internal microstructure of chemical substances and their macroscopic changes formed by students through the knowledge of chemical structure and the in-depth understanding of chemical structure.Then,the level of development of chemical structure idea of middle school students is divided.On the basis of relevant literature research,according to the "General High School Chemistry Curriculum Standards(2017 Edition)",the chemical structure of middle school students is divided into four levels of development,and the corresponding behavioral performance of each level is proposed.Third,a test tool for the development level of high school students’ chemical structure idea was developed.According to the development level of structural idea divided by the institute,the main question type is used as the open question answer,the structural concept development level test questionnaire is compiled,and the test is carried out in a high school in Jinan City,according to the data results of the test,the test tool is revised by Rasch model,and the revised test question is selected from two high schools in Jinan City for actual measurement,and the actual test results show that the test tool developed by the Institute has good reliability and validity.Finally,the development status of chemical structure idea of senior three students was investigated.The test results show that the development level of the structural outlook of the third grade students is not high overall,and the independent sample t-test is made on the school type and gender by SPSS software,and the results show that there is no significant difference in the development of the chemical structure idea of high school students in gender,but there is a significant difference in the type of school,and the development level of chemical structure idea of key high school students is higher than that of ordinary high schools.