The first step is to determine your own teaching philosophy. You can go online to learn about the new educational ideas of mathematics teaching and research in recent years. The new curriculum standard was promulgated in 2022. It is very important to find some enlightenment from the new curriculum standards.
The second step, after determining the teaching concept of the paper you want to write, you can start with the content of seventh grade mathematics. Find a chapter from the book that you think can definitely express your teaching philosophy and deconstruct it.
The third step is to design a class with your teaching idea, and then write down your class as the practice of the idea. Here, you can write down what needs to be improved and your experience.