Micro-course is the product of a new form of school-based teaching and research. Micro-class refers to the audio or video that explains a knowledge point in five minutes by using multimedia technology based on the idea of teaching design. In education and teaching, the content of micro-course professor is "point" and fragmented. These knowledge points can be the interpretation of textbooks, intensive reading of questions and induction of test sites. It can also be a knowledge explanation and display of skills such as method teaching and teaching experience. Micro-class is an effective supplementary form of classroom teaching. Micro-courses are not only suitable for knowledge dissemination in the era of mobile learning, but also for learners' personalized and deep learning needs. "What is the role of micro-courses? First, the role of micro-courses in the new teaching 1. Pre-class review design is based on students' existing knowledge base, connecting with the knowledge points needed for new knowledge, and making micro-lessons, so that students can watch this micro-lesson first after class to prepare for the new lesson. 2. The new lesson introduction teacher designs novel questions according to the knowledge points of the new lesson to attract students' attention and pave the way for the explanation of the new lesson to do this micro-lesson. Let the students watch this video after class. 3. Knowledge Understanding The teacher guides the key and difficult points in this section, and typical examples guide students to explore the law. After students explore independently or cooperatively, watch this video together. 4. Practice and consolidate the few but precise exercises designed by the teacher, and do micro-lessons to consolidate the knowledge in this section. 5. Summarize and expand to guide students to summarize the key points and laws of this section, so that students can incorporate knowledge into the existing knowledge system. Then design some expansion exercises to adapt to students of different levels. This video is for playing before the end of this lesson. The above links can be used alone or in combination. Second, the application of micro-lessons in students' autonomous learning. Now the development of network communication and the popularity of microcomputers make autonomous learning possible. The teacher makes the key and difficult problems in the study into micro-lessons and uploads them to the internet, so students can learn on demand at any time. Its advantages are as follows: 1. Micro-courses are short and pithy, with one topic and one key point. They are all designed for difficult problems in students' study, which is very suitable for students to study by themselves. 2. You can choose the time and place, and there is a lot of room for autonomy, as long as you have the desire to learn. 3. Adapt to different students and adjust the speed of video playback, so that students of different degrees can control the speed of video according to their own foundation and acceptance. 4. Because the video can be played repeatedly, students who are usually slow to respond and embarrassed to ask questions can watch it again and again calmly, which solves the problem of the transformation of underachievers. Third, the promotion of micro-courses to teachers' professional growth and teaching research 1. Making micro-courses is the process of micro-research. In actual teaching, it is simple and practical for front-line teachers to make micro-lessons from the process of discovering, analyzing and solving problems, which is a process of teaching reflection in itself and can effectively promote teachers' professional growth. 2. Micro-courses are conducive to the popularization of Internet and mobile devices, and to the exchange of teaching experience and methods among teachers; 3. Micro-class facilitates teachers' knowledge management, effectively promotes teachers' professional development and improves teaching effect. 4. Micro-courses are simple to make and novel in form. The accumulation, sharing and communication of resources through micro-courses can effectively improve teachers' self-confidence and sense of accomplishment, and improve their ability to integrate subject teaching with information technology.