Research On The Design And Application Of Micro-lesson In Mathematics Classroom Teaching In Junior Middle School

In recent years,"Internet + artificial intelligence + mathematics education" has given rise to an era of personalized,fragmented and micro-learning education.Micro-course is not only a research hotspot of basic education,but also an important topic of educational technology research because of its prominent theme,short and concise,diversified forms,simple application and convenient dissemination.Especially since the outbreak of covid-19 this year,online education and online micro-learning have become hot topics.At present,there are some prominent problems in the research of mathematical micro-lessons,such as "most of the micro-lessons are not of high quality,so I don't know how to optimize them if I want to improve them","although there are some high-quality micro-lessons,I don't know how to effectively apply them",etc.Therefore,it is urgent to explore how to effectively design and apply mathematical micro-lessons."Parallelogram" is a very important part of junior high school mathematics content,after studied the parallel lines,triangles,axisymmetric the further study of the geometry and the teaching difficulty lies in parallelogram contact with distinction between special parallelogram,and cultivate students to form the basic ideas of research on geometry.Based on the theory of multi-representation learning,this paper tries to design and apply micro-lessons for the key and difficult points in classroom teaching,so as to improve the effect of classroom teaching.This article mainly from the theory research and the practice research two dimensions carry on the detailed discussion.Research results at home and abroad in terms of theory,research,the micro class design and application of micro course and the research status of micro class evaluation,as well as the micro class design related basic theory,around the "micro class was applied to classroom teaching" is a central problem,put forward from the perspective of classroom teaching of class design principles: economy principle,need principle,the principle of suitability,the principle ofsubsidiarity,ethical,circulating principle;Combined with the classroom teaching micro-class design strategy: teaching content design strategy,teaching objectives design strategy,teaching link design strategy.In practice,the content of the parallelogram and diamond in junior middle school mathematics is designed for the micro-lesson,and the micro-lesson is applied in the actual classroom teaching.In addition,from the two aspects of the curriculum attribute and the effectiveness of the application of information technology,the micro-lesson is evaluated in the process,the multi-evaluation and the overall evaluation of the curriculum.The research results show that the micro-class based on design principles and design strategies has a certain auxiliary effect on the effective development of classroom teaching and a certain promoting effect on the improvement of students' emotional attitude in the learning process.