An Assessment Study Of The Particle View Of High School Students Based On Rasch

The main purpose of chemistry course education is not only to impart the basic knowledge and methods of chemistry to students,but also to focus on the cultivation of students' innovative ability and basic concepts of chemistry,which will help high school students gradually establish a scientific awareness of observing problems,analyzing problems and resolving problems from the perspective of chemistry.By reading the literature,the author conducts theoretical research on the chemical particle concept of high school students.By learning the basics of particles,you gradually gain a general understanding of the chemical properties and the laws of their chemical changes.Then,through the analysis of the knowledge content of the new high school chemistry curriculum,combined with the suggestions of teachers and experts,the chemical particle concept of high school students is divided into four horizontal levels of characterizing simple material characteristics,understanding the properties of matter and inductive chemical reaction changes,analyzing the relationship between particles and chemical reactions and elemental properties,explaining and predicting the properties of matter and possible reactions,and describing the corresponding quality of each level.In the evaluation study of the particle view of high school students,according to the author's division of the level of the particle view of high school students,a questionnaire for the chemical particle view of high school students was compiled on this basis.Conduct a round of testing to perform quality inspections of overall quality analysis,onedimensional analysis,project fit analysis,etc.through the Rasch model.In view of the problems found,the test questions were adjusted and improved,and finally the chemical particle observation tool for high school students with good quality indicators was obtained.Using the testing tool,the particle view of high school students is evaluated.The assessment results found that the overall level of chemical particle concept among high school sophomores was in the upper middle.The number of students is mainly distributed in level two and three,accounting for about three-quarters of the total number of students,and there are some levels one,but the number is small,and the number of high school students reaching level four accounts for about one-fifth of the total sample.In addition,the SPSS software was also used to count the number and percentage of different schools,different gender particle view ability levels and levels,the relationship between the particle view and the school type and sex was analyzed,and it was found that the ability value of boys with chemical particle view level was slightly higher than that of girls,but it was independently tested t,and found that there was no significant difference between the chemical particle view level and gender,and the relationship between school type was more significant,and the level of particle view in key high school students was significantly higher than that of ordinary high schools.The innovation of this study is that the four levels and behavioral performance of the chemical particle view in high school are defined,the Rasch model is used to develop the measurement tool,and the chemical particle level of the students is investigated,and through the comprehensive analysis of the questionnaire survey results,the basic situation of the current development level of the chemical particle concept of the students can be used to give scientific education opinions.