1. Example leads to the phenomenon of derivative function.
Put forward the concept
3. Distinguish the inverse proportional function or complete simple calculation.
1. Derived from proportional function
2. Positive and negative proportional function judgment
3. The application of inverse proportional function
1. Presenting the concept link: Most competition micro-courses are eager to give the concept, and Khan Institute pays more attention to the characteristics of perceiving inverse proportional function in operation.
2. Judging link: most of the micro-courses in the competition will give the results soon after asking questions, and Khan Academy will demonstrate the transformation process.
3. Application link: Most of the contest micro-courses give the results of solving problems, and Khan Academy pays more attention to analyzing the quantitative relationship in the problems.
4. Generally speaking, watching China's micro-lessons always feels like watching the fun, and watching Khan's micro-lessons, there is an impulse to pick up a pen and count together.
1. Micro-class should pay attention to the key points, difficulties and doubts in students' learning from the perspective of problems. ? It is a waste of time to do micro-lessons for those problems that can be understood at a glance and explained as soon as possible.
2. Micro-class is just a teaching form and can be used as a supplement to other forms of education. There is no need to regard micro-lessons as the only panacea. The serial micro-courses advocated by some groups are driven by some commercial interests, and some contents of some disciplines are more suitable for recording micro-courses, but they are not universally applicable.
3. There is no difference in the tools for recording micro-courses, especially don't underestimate the role of PPT. It is most important to make good use of various tools to foster strengths and avoid weaknesses. Although some teachers use the so-called relatively novel demonstration tools, they still think about PPT in their bones, so it is better to use PPT well. In my opinion, what way to speak is more important than what tool to speak with. There are no pictures and music in the micro-courses of Khan Academy, and it can win people's hearts only by enlightening explanations.
4. The ultimate mission of micro-lesson is to go to the classroom. If competition and teaching are separated just for the sake of competition, then today's micro-class fever will eventually move towards "its prosperity is also rich, and its death is also sudden."
Micro-courses should build a strong ecosystem, not just make a small video. It includes content distribution system, evaluation system and interactive communication system. Nowadays, micro-lessons are often understood as small videos, ignoring other systems, and such micro-lessons have almost no practical value.
6. We often say that teaching should be student-centered. When recording micro-lessons, we should think about teaching methods and processes from the perspective of students' learning, although we don't face the students.
7. Compared with other teaching methods, micro-lesson has an important advantage, that is, it makes full use of visual factors, so how to visualize the teaching content is the key to the success of micro-lesson.