Research On Teaching Strategy Of Junior High School Chemical Difference Calculation Based On Problem Continuum

According to the survey,the quantitative calculation questions,especially the difference calculation questions,in junior high school chemistry problem solving are more difficult,and are the most likely to produce obstacles to solving problems,resulting in the loss of interest and confidence of students in solving problems.The theory of "problem continuum" proposed by American scholar professor j.Maker can provide useful enlightenment for solving these problems.Therefore,this paper focuses on the application of "problem continuum" in the teaching of chemical difference calculation in junior high school,in order to solve the problems encountered in chemical quantitative calculation,especially in the teaching of difference calculation.This paper consists of the following five parts:The first part is the introduction.This paper mainly introduces the background,research content,research method and research significance of the topic,and briefly describes the relevant application research status of the "problem continuum" theory.The second part introduces the investigation of chemical computing in junior high school.The purpose of this study is to understand students' practical difficulties in solving chemical calculation problems through questionnaires,so as to provide a basis for designing targeted teaching strategies.The third part is the theoretical basis of this paper.The key combed the American scholar(j.von Maker)"problem continuum" theory proposed by professor on this basis,this paper expounds the junior middle school chemistry problem continuum design strategy and the application of continuum theory in the junior middle school chemistry teaching strategy,to the "problem continuum" under the guidance of the theory of junior middle school chemical dispersion calculation teaching strategy design and lay the foundation.The fourth part is the application research of "problem continuum" theory in the teaching strategy of chemical difference calculation in junior high school.This part presents the teaching design case of junior high school chemical difference calculation based on the problem continuum,and analyzes the effect of the implementation of the teaching case through the pre-test and post-test data.The test results show that the "problem continuum" strategy is effective for the learning of chemical difference calculation in junior high school.The fifth part expounds the main conclusions of this paper and prospects the future research work.