Research On Design And Application Of Pre-assignment Of High School Chemistry Exploratory Experiment

In 2010,the Outline of the National Medium-and Long-term Education Reform and Development Program（2010-2020）,which aims to "train high-quality professionals",was released.Against this background,in 2018,the Ministry of Education issued the "General High School Chemistry Curriculum Standards（2017 Edition）" to advocate through a variety of exploration activities mainly based on chemical experiments,so that students can improve their practical ability,collaboration ability,thinking ability and innovation ability in practical exploration.The teaching method of pre-assignment is "learn before doing,learn before teaching,teach less and learn more,and teach according to learning".Introduced in the exploratory experiments pre-assignment,teachers can use the characteristics of pre-assignment such as learnability,openness,and autonomy,arouse the enthusiasm of students to explore,guide students to learn and use have been related to knowledge and experience to explore and solve the problem,gradually construct their own knowledge framework,so as to give full play to the exploratory experiment teaching function.Firstly,through literature research,this study grasped the current situation of the research on the exploratory experiment teaching of chemistry in senior high school and pre-assignment.Through questionnaire survey and interview,the actual situation of exploratory experimental teaching is understood and problems in exploratory experimental teaching are found,so as to analyze the necessity of the application of pre-assignment in exploratory experimental teaching.Secondly,by analyzing the requirements of curriculum standards for exploratory experiment teaching and combining with the characteristics of pre-assignment,the feasibility analysis is carried out to obtain the advantages of applying pre-assignment in exploratory experiment teaching.Finally,on the basis of necessity and feasibility analysis,the design principle,design process and implementation steps of exploratory experimental pre-assignment are put forward.During the 4-month education internship,the author carried out teaching practice on the exploratory experiment based on pre-assignment.After practice,the teaching feedback and evaluation are obtained through student questionnaire survey and teacher interview.The results show that the application of pre-assignment in exploratory experiment teaching can improve students’ attitude in learning exploratory experiment,improve students’ ability to find,analyze and seek solutions to problems,and improve the classroom teaching efficiency of exploratory experiment.