Pearl,

It will become more natural for you as you go on what you want to see from your students. My avg was 15-20 hrs, but mine were non-professional types, only flying for fun. Even with that, it was easy to teach the basics because our planes were just that. One 172 had a loran, the other had a crap "fly buddy" GPS. The 152s had nothing but a nav/com.

Btw, never ever tell a student ahead of time that you plan to solo them that day, easier for everyone when it's a suprise