The Application Of “Three Doubts And Three Probes” Teaching Mode In Chemistry Exercises' Problems Solving Class In High School

As an essential part of chemistry teaching in middle school,exercises' problems solving plays an important role in developing the core quality of chemistry;Therefore,this paper mainly studies Chemistry exercise classs and its teaching mode to further promote the development of the discipline.This paper consists of six parts.The first part is the introduction.In this part,the background and significance of this paper are introduced;Then,by searching and reading the journal literature related to the research of chemistry exercises in middle school and the teaching mode of "Three Doubts and Three Explorations",the research status of chemistry exercise classs in middle school and the teaching mode of "Three Doubts and Three Explorations" at home and abroad is summarized.In addition,the research methods and ideas of this paper are expounded.Finally,the main problems of this paper are clarified.The second part is the theoretical overview.This part first defines the concept of teaching mode and chemical exercise teaching,and then basically explains the core literacy of chemistry,and the theories of supporting independent learning,inquiry learning and cooperative learning.The third part is the investigation and analysis of the present situation of chemistry exercise teaching in Senior Two.In order to fully understand the present situation of chemistry exercise teaching in senior high schools,the author first interviewed teachers and then conducted a questionnaire survey on students.The fourth part is a brief introduction of the teaching mode of "three doubts and three explorations".Firstly,this paper expounds the concrete operation process of "three doubts and three explorations" teaching mode in chemistry exercise class of senior high school and the key links of "three doubts and three explorations" teaching mode,and then explains the advantages of this teaching mode from different angles.The fifth part is the research of teaching practice.The teaching mode of "Three Doubts and Three Explorations" was applied to the experimental class and the traditional teaching mode was applied to the control class.After one semester's teaching practice,the final exam results of the two classes were analyzed by spss20.0,and the students were interviewed and investigated.Meanwhile,the students in the experimental class and the control class were tested for their core literacy level by taking part of the chemical reaction principle of Senior Two as the carrier to test the effectiveness of the teaching mode of "Three Doubts and Three Explorations".The sixth part is the conclusion and prospect.With the proposal of discipline literacy and the close connection with the college entrance examination,the cultivation of discipline literacy is an urgent problem to be solved in middle school teaching.From the perspective of teaching practice,exercise class plays a vital role in cultivating students' subject quality.Although there are many documents about the research of high school chemistry exercise class,there is little research on the systematic and feasible teaching mode of chemistry exercise class in senior high school.The high school where the author teaches is Nanyang No.1 Middle School,which actively carries out research of curriculum reform and puts forward the teaching mode of "Three Doubts and Three Explorations".However,this mode has been resisted by some students and teachers in the implementation process,and has not been fully promoted.Therefore,the author applies it to practical teaching and compares it with the traditional teaching mode.The results show that the grades of classes using the teaching mode of "Three Doubts and Three Explorations" are obviously better than those using the traditional teaching mode.Through interviews with students,students generally report that they have a high degree of acceptance of this model,which can improve the ability of knowledge transfer and application and draw inferences from others,and also contribute to the cultivation of subject literacy.In addition,after teaching practice,the students' subject core literacy is tested and found to be significantly better than before teaching practice.The teaching mode of "three doubts and three explorations" can improve students' interest in learning chemistry,strengthen students' ability of independent exploration,improve students' flexibility in applying knowledge,and promote the cultivation of students' core literacy in chemistry,thus improving students' academic achievements.For teachers,the role changeing has been realized through the use of the teaching mode of "three doubts and three explorations".In traditional teaching,teachers act as protagonists in the classroom,but in the teaching mode of "three doubts and three explorations",students' dominant position has been reflected,and teachers have become leaders,promoters,collaborators and answering questions in teaching activities.In addition,the evaluation method of exercise class has changed.In traditional exercise class,teachers basically evaluate students and evaluate knowledge.However,in the teaching mode of "three doubts and three explorations",there is more mutual evaluation among students,and the evaluation direction is more diversified.Besides evaluating the correctness of knowledge,it can also evaluate the display ability of the exhibitor and re-evaluate the evaluator.