The Design And Development Of Series Micro Lessons In High School Chemistry

With advances in Internet,educational information technology is constantly changing.In the curriculum standards of general high school chemistry,it is also emphasized to strengthen the development and utilization of chemical teaching resources inside and outside the school.Microlesson are dependent on the application of educational information technology.In the process of development,due to its short and pithy,prominent content and other characteristics,it gradually highlights the results.In the real teaching process,students need systematic construction of knowledge.The fragmentation of micro-lesson is difficult to meet the needs of students’ systematic construction of knowledge.Therefore,this paper uses the design and development of a series of micro-lessons to solve the opposition and unity between micro-lesson fragmentation and students’ systematic construction of knowledge.Taking "amount of substance" as an example,the design and development of a series of micro-lessons are carried out,and the core literacy of chemistry subject is integrated into the series of micro-lessons.The purpose is to better develop the core literacy on the basis of students ’ mastery of subject knowledge,and provide a series of micro-lessons teaching resources to help students improve their autonomous learning ability,learning efficiency and stimulate learning interest.In view of the above objectives,the following work has been done :(1)Through the literature research method,the research status of micro-lessons and series of micro-lessons are analyzed,and the focus of this study is found.Besides that the basic concepts in this paper are defined and the theoretical basis of this study is determined.(2)In the early stage of development,according to the needs of students,the main difficulties faced by the development of series micro-lessons are analyzed and effective application strategies are tried to put forward,and a series of micro-lessons development models are constructed.(3)According to the series of micro-lessons development model,the series of microlessons of the ’ amount of substance ’ are developed;(4)In the practice school,the "amount of substance" series of micro-lessons are implemented.The case study method,questionnaire survey method and teacher interview method are used to evaluate the implementation effect of the "amount of substance" series of micro-lessons.The results show that the series of micro-lessons can solve the shortcomings of scattered and single micro-lessons to a certain extent,and help students construct knowledge systematically.Teachers and students agree with the series of micro-lessons,and think that the development of series of micro-lessons teaching resources can effectively improve self-learning ability and learning efficiency,hoping to apply it to teaching links.