Interest is the best teacher. First of all, you need to be interested in the selected topic, so as to maintain lasting enthusiasm and motivation in the research process. You can choose your subject according to your hobbies, professional background and future career planning.
2. Understand the research field. Before choosing a topic, you need to have a certain understanding of the research status and development trend in the field of mathematics education. This can be achieved by reading relevant books, journal articles and research reports.
3. Determine the research direction. Mathematics education is a very extensive field, including curriculum and teaching theory, learning psychology, evaluation and examination. You need to determine a specific research direction according to your interests and abilities.
4. Look for research questions. After determining the research direction, you need to find a specific problem to study. This problem should have certain theoretical significance and practical value.
5. Refer to excellent papers. You can consult some excellent mathematics education papers, get inspiration from them and learn from experience. These papers can be obtained from academic databases, libraries or tutors.