Design And Research Of Micro Lesson Based On Chemical Key Competencies

With the development of information technology,great changes have taken place in the field of education.In 2017,the issuance of "13th Five-Year” plan for the development of national education emphasized the development of education informationization.As one way of educational informationization technique,micro lesson has attracted much attention because of its unique advantage.China Modernization Education 2035 issued by the State Council in 2019,emphasized and required students to develop key competencies.Therefore,it is impossible to research the application of micro lesson for teaching without the discussion on key competencies.At present,there are few reports on the research and construction of micro class involving both key competencies and micro lesson.This paper takes the integration of micro-course and chemistry discipline knowledge as the research direction,combined with the main problem existing in current traditional chemistry class,takes advantage of the design mode of distance open education curriculum,develops topic micro-course on chemistry in the high school,studies the design and application of micro lesson under the view domain of chemical key competencies,and looks forwarding to taking micro lesson as the carrier.In that way,the reader can understand the key competencies and subject knowledge completely and clearly.At the same time,this research will help to develop more and better micro lessons in line with local learning and teaching,to promote chemistry teaching and students to learn effectively,then improve their key competencies.Surveys and interviews with local students and teachers show that students’ chemistry key competencies is in bad situation,and micro lessons are warmly welcome.In that way,it is very important to design and make a micro lesson which meets the requirement for process of teaching and learning,and cultivates students’ key competencies.This thesis selects a high school chemistry topic "the movement of electron outside the atomic nucleus" as the object,based on analyze its knowledge characteristics,curriculum standards,the requirement of learning and teaching,to construct micro lesson design model with target structure,content structure,process structure and implementation structure,to design micro lesson case in the practice of students’ learning,including making preparations for lessons before the class,applying for lesson and reviewing after the class.After applying micro lesson,the feedback from students indicates some points as bellow:(1)micro lessons can help students to learn and understand abstract concept,no matter in preparations for lessons before the class,during the class,or after the class.Students absorb knowledge more easily;In order to avail the beneficiaries widely,micro lessons can be designed and developed in different angles to stimulate students be interested in learning.(2)Micro lesson is a good auxiliary teaching tool,its subject can be set in a concept,a knowledge point or a question,but it is not applied for all knowledge points.As a result,when you are doing a micro lesson,you must decompose knowledge points reasonably and ensure that knowledge points are concise to be explained clearly in a short time.For some knowledge points that you will take a long time to explain should choose other forms to be shown.(3)The design of micro lesson must follow four basic principles: be explained clearly in short time,having clear theme,having integrity structure,flexible use.(4)Teachers are optimistic about the prospect of micro lesson in application,which means teachers can continuously study micro lessons in the future,improve the design of micro lesson,develop the models of application of micro lesson.(5)Chemical key competencies reflects only on some part of micro lessons,not all parts,therefore,do not have to pursue comprehensive when you are going to design micro lesson.