Native Japanese who can cover the topics from early age learning to business occasion

I used to be a student who learn English, but now I am keep to take the side of teaching Japanese. I will learn who is the audience for the class before it ever begins and offer what they are looking for. For example the topics for the class won't be the same for the student who has a plan of business trip to Japan as for the students who has a plan to spend time in Japan for holiday!