See what kind of old people you teach. 1, age, middle-aged or elderly; 2, personality, different personalities that the elderly like; 3. How many people listen? If you are a confident and targeted person, prepare for him. If it is a group of old people, prepare questions that everyone cares about. Here's an example: you can ask questions about the daily diet of common senile diseases or the precursors of senile diseases that everyone is generally concerned about in an interactive way, so that everyone can be more interactive and active. Wait a minute. You can think about it, or investigate them first.

Summary: Decide what to do after investigation and tell him what you like.