Chemical Process Problem From The Perspective Of Real Situation Teaching Research

Since 2015,a total of 12 sets of national college entrance examination papers have set chemical process questions.This kind of test questions is highly engineering and technical,which is closely related to the actual production of society.Teaching the chemical process from the perspective of real situations not only meets the development trend of chemical process questions in the senior examination papers,but also meets the requirements of the General High School Chemistry Curriculum Standard(2017 Edition),which can fully reflect the function and value of the chemistry discipline.The author analyzes the chemical process questions in the national college entrance examination papers from 2015 to 2019.Combining relevant literatures,it is found that the test questions are simplified processing of the actual chemical production process and finally presented a flowchart that meet the students' cognitive level.In addition,the main points of the examination questions are based on the teaching materials,and the stemming process is consistent with the chemical process involved in the teaching materials.Based on this,the author divides the real situation material of chemical production in the required textbook of human education edition into three levels according to the difficulty of chemical process and the cognitive level of students,and analyzes the content of each level.She put forward four teaching strategies according to the characteristics of the corresponding chemical process:chemical process simulation experiment,problem-driven model construction,information-assisted material understanding,and students' autonomous mapping of knowledge networks,and selected "Salt extraction from sea water","Hou's alkali process" and "The smelting of metal and aluminum" chemical production process from three levels,as an example to design teaching cases and develop teaching practice.The author evaluates teaching practice from student interviews,and instructor interviews to provide a basis for the practicality of the research.The results show that the teaching of chemical process problems from the perspective of real situation can help students to reduce the strangeness of test questions,form a learning perspective of application and improve the ability to solve practical problems by using the chemical knowledge they have learned.In addition,it can improve the effectiveness of teaching and cultivate the core quality of students' chemical subject.