A Preliminary Study On The Hierarchical Design Of Chemistry Homework In Senior High School

Homework is an important part of high school chemistry teaching.Homework is an extension and supplement of classroom teaching.Homework is a tool to help students consolidate knowledge and help teachers get feedback.With the deepening of curriculum reform,great changes have taken place in the teaching and learning methods at the present stage.However,the current chemistry homework is still the way of unified homework,unified difficulty and unified evaluation.The current chemistry homework ignores the differences and needs of students and hinders all-around development of students.Therefore,in order to promote the all-round development of students' Chemistry Core Literacy and improve the quality of students' work,it is necessary to study the hierarchical design of chemistry homework(stratified homework)in senior high school.In the paper,the ideas and methods of this research are according by current teaching problems and searching lots of literatures to understand the current situation of chemical operations.The ideas and methods of this research are also according by the research status of stratified to operation at home and abroad and reviewing experience summary from others on operation study.What's more,I also investigated the status of students' chemistry homework and interview other chemistry teachers to understand the current problems of students' chemistry homework.In order to improve the quality and efficiency of chemistry homework,a new homework mode-stratified homework is put forward,designed and implemented.Then this paper studies the design and implementation of stratified homework from the theoretical and practical levels.This paper puts forward the design requirements and strategy of stratified homework,and designs the stratified homework of the first chapter and the second chapter of Chemistry Compulsory 2 by summarizing the previous experience,and studying the requirements of chemistry homework in the curriculum standard(2017 edition).In the study,the author chooses three parallel science classes as experimental classes,the same class as the control class.The students of three classes are divided into A,B,C three levels,and three levels students are required to do stratified homework.I also give different encouragements or praises to different students while correcting the stratified homework.At last,the author gets to know the practical effect of stratified homework by the method of questionnaire to find out the change of the students caused by the stratified homework and by comparing the results of the students' chemistry examination.After detailed research,the following conclusions are drawn:1.Stratified homework can increase the probability of students at all levels completing homework independently.Students can choose the type of homework in dependently and complete homework dependently,so the behavior of copying homework naturally decreases.2.Stratified homework can correct the students' attitude to study chemistry.According to the daily results of homework,the students attach importance to homework and can continuously obtain a sense of accomplishment from homework,and the enthusiasm for learning of students is enhanced.3.Stratified homework can lighten the students' burden of studying chemistry.Because the students of different levels can choose the assignments that suit their abilities,which can not only improve the correct rate of answering questions,but also deepen the understanding of knowledge points,so the burden of studying chemistry can be lightened naturally.4.Stratified homework can enhance students' confidence in learning chemistry.Because students can get a sense of achievement during the homework,and the confidence is naturally enhanced.Through the research,it is confirmed that the hierarchical operation has the value of popularization and application.But the rationality of the design of the hierarchical operation has yet to be further by practice.It remains to be studied which is how to guide the students to correctly understand their own knowledge level so as to choose appropriate hierarchical homework,and how to design the hierarchical homework systematically and efficiently.What's more,it remains to be studied whether there is an effective evaluation model corresponding to the hierarchical operation.