Analysis On The Causes Of Teaching Difficulty Of "Amount Of Substance" And Research On Teaching Strategies

In the compulsory chemistry textbook of the Pep edition,the concept and content of "amount of substance" are the contents that students should learn at the beginning of high school.The concept of "amount of substance" plays a fundamental role in the high school chemistry textbook,It is also throughout the in chemistry learning process high school chemistry,So it is an essential tool for students to learn chemistry,especially chemistry calculation,Morever,amount of substance in the later study,such as REDOX reaction,electrochemical,It cannot leave the material such as metal and nonmetallic compounds are related to amount of substance knowledge.However,the students found it difficult to understand the concepts of "amount of substance" and "Avogadro's number",etc.,so they only knew half a thing in class and got the correct rate of doing the questions very low.At the same time,teachers also find it difficult to teach,the teaching effect is not good.These are the current dilemmas in teaching.Therefore,it is necessary to study the amount of substance,and it is urgent to find a teaching strategy to solve the problem.The author first of all,through the methods of questionnaire investigation,interview,No.1 Middle School of Luxi County,Yunnan Province as the research object,analyses the cause of the "amount of substance" teaching difficulty,and then causes according to the teaching difficulties,with the help of constructivism learning theory,put forward the corresponding strategy for teachers and students,the final will be teaching strategy in the high school students in implementation,and use a variety of evaluation methods toevaluate the teaching strategy.Through research,the author believes that the reasons for students' difficulty in learning "amount of substance" mainly come from :(1)difficulty in understanding concepts;(2)Formulas are easily confused and will not be applied;(3)Poor learning methods;(4)Little study time,weak foundation.The reasons why teachers are difficult to teach come from such factors as the difficulty in teaching materials,the difficulty in teaching for students and the need to improve the comprehensive quality of teachers themselves.Aiming at the causes of the difficulty of "amount of substance" teaching,the author analyzes the following strategies.Strategies for students: lay a solid foundation and review the knowledge of micro particles in junior high school;Improve your learning methods.Strategies for teachers :(1)to improve students' interest in learning by creating situations such as interesting celebrities,chemistry history and situational teaching around them.(2)through class view examine and inquiries,interview students,collect Suggestions,questionnaire,consult materials and consulting in grade three old teacher,grasp the learning situation,carries on the effective teaching.(3)Timely induction of problem solving methods.(4)To improve the comprehensive quality of teachers and form the habit of lifelong learning by listening to lectures more often,asking old teachers more,multimedia learning,ordering teaching journals they like,etc.(5)Strengthen the humanistic care for students.The teaching strategy proposed by the author is implemented in four classes.According to different evaluation methods,the experimental classes have achieved obvious teaching effects.Therefore,the teaching strategies proposed in this study have achieved certain results in practice,providing reference and Suggestions for the majority of front-line educators in the teaching of "amount of substance" in the future,with practical significance!...