Research On Teaching Practice Of Material Structure And Nature Based On PBL Model

The content of the material structure and property module is relatively abstract and focuses on the micro world.At the same time,the proportion of this module in the previous chemistry teaching is relatively low.Facing the growth needs of middle school students in the new era,the urgent needs of the development of students' core literacy,and the new reform situation of college entrance examination,more and more attention is paid to the examination of students' application ability,which also puts forward higher requirements for the classroom teaching of material structure and nature module.Problem-based learning(PBL)drives learning through the problem-based approach,stimulates students' interest in learning by creating problem situations,and takes students as the main body to promote the development of classroom links.According to the PBL model,teachers have clearer methods and context in teaching design and classroom practice.In the form of step-by-step problem design,it can better stimulate students' interest in in-depth thinking and deeper memory.The PBL model is applied to the practical teaching of material structure and nature.Through the form of problems,students are easier to find their doubts.Combined with the promotion of problems and the solution of problems,they can grasp the key and difficult points,transfer knowledge better on the basis of understanding,and feed back to the solution of problems,so as to better cultivate students' thinking development and cultivate students' core literacy.Through the pre-test,cognitive impairment diagnosis test of material structure and property teaching,PBL model practical teaching and post-test,and data statistics and analysis,this study aims to solve the following three problems:(1)what are the problems of senior high school students in the module of material structure and property?(2)How to integrate PBL teaching mode into senior high school chemistry teaching of material structure and properties module to solve students' problems?(3)Is the teaching practice of the material structure and nature module of PBL teaching mode effective and feasible?Through the comparative analysis of the results of the pre-test and post-test,combined with the student questionnaire survey and the interview feedback between teachers and students,the following conclusions are drawn: PBL teaching mode highlights the dominant position of students;PBL teaching mode makes the classroom context clearer;PBL model has high requirements for teachers' ability.