Explanation:

- The word "Paediatrics" refers to the branch of medicine dealing with the health and medical care of infants, children, and adolescents. It's unrelated to teaching methods.

- Pedagogy is indeed the correct term. It refers to the art, science, and profession of teaching. It encompasses teaching methods and strategies.

- "Training" is the process of acquiring skills, knowledge, and competencies, usually for a specific job or activity. It is related but not specific to teaching methods.

- "Philately" is the study and collection of postage stamps, postmarks, and related materials. It has no connection to teaching.