Research On Problem Chain Teaching Under The Guidance Of Chemical Teching Model Construction

The core qualities of chemistry include macro identification and micro analysis,evidence reasoning and model cognition,change concept and balance thought,scientific exploration and innovation consciousness,scientific spirit and social responsibility.Among them,evidence-based reasoning needs evidence,and model-based cognitive needs model.This paper presents evidence based on problem chain teaching,constructs model based on evidence chain,and carries out practical application based on model,so as to provide suggestions for the cultivation of students’ model construction thinking.High school chemistry knowledge is scattered,some knowledge is abstract and obscure,and the model is difficult.And high school chemistry is not high in the high school discipline,and the learning difficulty is not high or low...Resulting in the situation that the school level does not pay enough attention to the high school chemistry discipline.First,from the leadership level,it artificially shortens the time for students to learn chemistry;Chemistry teachers’ enthusiasm for chemistry teaching is greatly reduced,so that they artificially reduce the quality of lesson preparation;It reduces students’ interest and time in learning chemistry.This paper mainly discusses that problem chain based teaching can help students build chemistry models,help students learn chemistry and improve their chemistry scores.This paper takes two ordinary classes of students in a certain demonstration high school in Guizhou Province as the experimental object,uses the test papers for pre-test,middle-term and post-test and questionnaire survey,and studies the changes of senior three students’ model construction ability before and after problem chain teaching.It is divided into six parts.The first part summarizes the background of the topic,the significance of the research,the current situation of the topic and the implementation methods.The second part briefly describes the definition of the concepts proposed in the paper,and introduces the theoretical basis supporting the research of this paper.The recent development zone theory and constructivist learning theory are the basic starting points of this paper.The third part,taking metal element compounds as an example,carries out teaching design combined with problem chain design,completes teaching tasks based on teaching design,reflects on the teaching process,and optimizes the role of problem chain teaching in the construction of chemical model.The fourth part takes the entrance examination papers of the first semester of senior three as the pre-test,the mid-term examination results as the mid-term test,and the mid-term examination results of the second semester as the post-test.This paper analyzes the changes of students’ thinking ability of chemical model construction in each stage of problem chain teachingThe fifth part is the conclusion and Prospect of this study.From this study,we draw the following conclusions:1.Problem chain plays a positive role in cultivating the thinking ability of model construction;2.There is a positive correlation between chemistry subject model construction ability and students’ mastery of basic knowledge;3.Chemistry test scores are positively correlated with students’ ability to construct chemistry subject model.