Research On The Evaluation Of The Concept Of Chemical Energy In Middle Schools

The key point of chemistry teaching is to cultivate students' chemistry core literacy,and one of the important components of chemistry core literacy is the basic concept of chemistry.So,how to construct students' basic concept of chemistry?What is the level of students' basic concept construction of Chemistry now?These are some problems that are often encountered in the chemistry teaching nowadays.There are many basic concepts of chemistry,including many researches related to the concept of energy.The following is a brief description of the six parts of this study.In the first part,the author mainly introduces the research background related to the concept of chemical energy and the current research situation at home and abroad.Then according to the current research situation,the purpose,significance,ideas and methods of the research are put forward.In the second part,according to the research on the theory of chemical energy concept,through the study of many literature related to chemical energy concept,the connotation of chemical energy concept is defined.In the third part,according to the new curriculum standard,the chemistry textbook of junior and Senior High School of human education edition,and the chemistry examination syllabus of college entrance examination,the author has compiled the evaluation index system of energy concept of chemistry discipline,which includes three first level indexes,namely "material energy concept","change energy concept" and"energy energy concept".ach primary indicator is subdivided into two secondary indicators,and each secondary indicator is followed by several basic understandings.Finally,there are a total of 16 basic understandings.Inspired by Bloom's theory of educational taxonomy,the author also worked out the corresponding scoring standards,combined with the requirements of the new curriculum standard and the college entrance examination outline,and used the two-stage proposition method to work out the evaluation tool of the chemical discipline energy concept of high school students.The fourth part is to investigate the construction level of energy concept of some students in 9 high schools(3 provincial demonstration key high schools,3 municipal demonstration key high schools and 3 ordinary high schools)in Wuhan.Using the principle and method of educational statistics,the paper compares the construction level of chemical energy concept of students of different gender,grade and school,and finds that most of the students are currently in There are some problems in the construction of energy concept of chemistry.The results show that:(1)different gender students have different levels of building chemical energy concept,most of the boys can reach the application level,a few of the boys are at the understanding level,while most of the girls are only at the understanding level,a few are at the application level.(2)The chemical energy concept of students in senior two and three can basically reach the application level,but the application level score of students in senior three is higher than that of students in senior two,but the stratification is still obvious.(3)The construction level of chemical energy concept in different schools is different.Most of the provincial demonstration can reach the level of analysis.The level of chemical energy concept of the municipal demonstration students is in application,and the level of chemical energy concept of the general high school students is in understanding.The gap is obvious.(4)Most of the students' micro level energy view construction level is not good enough,and the construction level of "energy view between particles","energy view inside particles"and "energy view of micro change" needs to be improved.The fifth part is some teaching suggestions for front-line teachers:(1)to update teachers' teaching ideas.(2)Strengthen the study of textbooks.(3)Pay attention to the energy concept in the process of particle and transformation.(4)Teach students according to their aptitude.The last part is to reflect on the existing problems of this study,and to look forward to the future of this study.