Research On Optimizing The Homework Of Buoyancy Chapter Of Physics Courses In Junior Middle School

In recent years,the education community has paid more attention to the core literacy of the subject,and the requirements for students' core literacy are getting higher and higher.Under this background,all aspects of physics teaching are constantly being optimized,but the research on the optimization of physics homework is relatively slow.The buoyancy chapter is the focus and difficult learning content of the physics course in junior middle school,and the research on the optimization of its homework is even more scarce.In order to optimize the homework of buoyancy chapter of physics courses in junior middle school,this article used the method of literature research and investigation,surveyed the buoyancy-related questions in the buoyancy chapter homework and practice tests of 90 students at school,comprehensively analyzed students' completion of buoyancy chapter homework,summarized the characteristics and shortcomings of the buoyancy chapter homework and the influence and relationship of students' completed homework on the exam results of this chapter,and further given the optimization plan for the homework of the buoyancy chapter.The main research results obtained are as follows:(1)The following three aspects of the homework and test questions of buoyancy chapter were investigated:(1)The amount of each question type of the homework and test questions was counted,and the knowledge points of the homework and test questions were sorted out;(2)From eight dimensions,students are divided into two groups with better and poorer homework,and the test scores are used as test variables to test the independent sample t;(3)The test results of students and the performance of each question type are used as test variables,and correlation analysis is performed from six latitudes.Through the investigation and analysis,the following main conclusions are obtained:(1)Most students can complete the buoyancy chapter homework,and make mistakes seriously,but cannot complete the homework with high quality.At the same time,the completion of homework according to quantity,high-quality homework and careful correction of errors all contribute to stable and excellent test scores.(2)Knowledge points for homework and test questions: homework tends to test the knowledge of Archimedes' principle,while test questions tend to test the comprehensive knowledge of density,pressure and buoyancy;homework differs greatly in the amount of questions set by the four methods of calculating buoyancy,and the amount of questions set by the test questions is almost equal;Both homework and test questions focus on the experiment of exploring what factors the buoyancy is related to;The proportion of test questions on density and buoyancy,as well as pressure and buoyancy is higher than the homework;The number of questions in the stress diagram of the crop body in the homework is lower than the test questions.(3)For each type of homework:the quality of each type of question completed by the student has a significant impact on the average score of the test and has a positive correlation with the test score;There are not many questions on the calculation questions,but they have the greatest impact on the test scores;Both the multiple choice question and the fill-in-the-blank question have a promoting relationship with the discussion calculation question;In addition,the number of experimental inquiry questions and drawing questions needs to be increased appropriately,and the relevance of their completion quality and test scores needs to be improved.(2)According to the conclusion of the investigation and analysis,from the six aspects of operation resources,types,quantities,content,evaluation and reflection,the optimization suggestions of the buoyancy chapter operations are proposed,mainly including: expanding the operation resources and types,appropriately increasing and decreasing the number of questions of each type,the consolidation of new courses and the deepening of special topics,the conversion of objective questions and subjective questions,emphasis on drawing to master force analysis skills,improvement of homework evaluation and error correction methods,etc.Combined with the above optimization suggestions,we designed three types of job evaluation forms and four job cases,including the post-curricular topical homework of "Integrated Density,Pressure and Buoyancy",the pre-class experiment homework of "Archimedes Principle",the post-experiment homework of "Floating Condition and Application of Objects",and the end of chapter homework.