Analysis Of Chemical Technological Process Question In College Entrance Examination And The Research And Practice Of Teaching Methods

Chemical technological process question type is novel in form,rich in information,flexible and changeable.It integrates the cutting-edge knowledge of chemistry discipline or the latest technological achievements of chemical technology,which is closely related to social life and highlights the scientific significance of chemistry discipline.It not only focuses on the understanding of the core knowledge content of chemistry in senior high school,but also focuses on the examination of students' abilities of analytical reasoning,experimental exploration and problem solving.Therefore,chemical process question type has important proposition value and research value.This study adopts literature research method,text research method,questionnaire survey method,interview method,and takes the chemical technological process question type as the object of study,carries out a statistical analysis on the proposition of the chemical technological process question type of the National College Entrance Examination papers from 2016 to 2019 from the aspects of their score and proportion,examination scope,specific examination site distribution,examination carrier and difficulty.And based on the propositional model of chemical technological process,this study sorts out the relevant knowledge points and tries to explore the way to solve the problem.In addition,this study investigated the current situation of chemical process learning and teaching of students and teachers,and designed teaching cases with problem-guided teaching method and scaffolding teaching method and applied them to practical teaching.At the same time,the study made statistics and analysis on the data of students' chemical process questions before and after teaching,so as to understand the influence of practice teaching on students' chemical process questions.It is found that the score setting of the chemical process question type is stable and the score value accounts for a large proportion.The examination scope is large and relatively stable,the comprehensive is strong and the coverage is wide;The specific test sites are miscellaneous and rich,and they present in various forms;The examination carrier setting is novel and the material is extensive,which has great situation and the opening;The difficulty of proposition is relatively stable and at a medium level.At the same time,the teaching cases designed by problem-guided teaching method and scaffolding teaching method solved students' learning difficulties to a certain extent,and helped to improve students' performance in chemical process questions.