1. The topic size should be moderate. According to the feasibility principle mentioned above, the topic should not be too big or too wide. Otherwise, there may be two problems: first, it may exceed the author's subjective ability. Especially for young teachers who are just engaged in teaching, they should consider their own knowledge base, professional ability, teaching experience and scientific research experience, and first choose a relatively small and specific topic as a breakthrough to enhance their confidence and interest. Then, try more complex topics, so that your topic will grow from small to large, from easy to difficult, and gradually develop and improve.

2. The topic should have the spirit of the times. The topic selection is a very complicated, arduous, professional and technical work, which requires the author to have a thorough understanding of the current teaching situation and scientific research trends and accurately grasp the frontier information of the subject. For example, what are the hot spots, puzzles and key issues in current teaching practice; What are the controversial, supplementary or blank areas in the current theoretical research? At the same time, it should also be able to predict the future development trend and trend of teaching and scientific research in this discipline. Then, we can choose a topic with both the spirit of the times and the sense of advance more accurately.

3. The topic should be novel. For example, "how to stimulate and maintain students' interest in learning" is an old topic that has been talked about for more than 30 years. If there is no new idea, it is of little value to talk about it.

4. The topic should have practical value. Teaching practice is one of the important sources of educational research and topic selection of teaching papers. Only by following the dialectical materialist epistemology of practice-cognition-re-practice, choosing a topic from the first-line practice of teaching, through full analysis and demonstration, perfecting and sublimating it into theory, and then returning to the first-line teaching guidance for re-practice, can its practicality and operability be guaranteed.