Reasch On Evaluation Of The Physical Energy Concept Of Senior High School Students

The physical core literacy abstracts the value of discipline education from the aspects of physical concept,scientific thinking,scientific exploration and scientific attitude and responsibility.While the energy concept is an important component of physical concept,which has far-reaching significance for students to understand the energy relationship of all things in nature.On the basis of trying to construct the theory,this study puts forward the evaluation framework of physical energy concept,which includes four knowledge dimensions and five levels of energy concept.In order to improve the reliability and validity of test items,Rasch model of item response theory is used in this study.Through two rounds of tests,students' scores are fitted and analyzed.Finally,the difficulty level of each test item and ability level of students are given.The main conclusions are as follows:The distribution of physical energy concept of senior high school students is the most in level 3 and level 4,the second in level 2 and level 5,and the distribution of level 1 is very little,showing a distribution trend of more in the middle and less in the two ends.There is a significant difference in the level of physical energy between male and female students.The average level of male students is at 4,while the average level of female students is at 3.In the knowledge dimension of energy concept,the form of energy is the easiest for students,followed by the transformation and transfer of energy,the conservation of energy is a little more difficult,and the most difficult is the dissipation of energy.At the same time,this paper analyzes the problems that the difficulty level is higher than the average ability of students,and puts forward reasonable suggestions to promote the formation and development of students' energy concept.It mainly includes:strengthening the connection within and between disciplines,taking the construction of energy concept as the ultimate teaching goal;making rational use of students' pre concepts to promote the positive transformation of cognition;tracing the essence of energy relationship,establishing a reasonable physical situation;creating a good classroom atmosphere,and improving the way of evaluation attribution.