I agree with wsinsel. Attend a couple FJC at your DZ and if possible other DZ's. what it will do is show you how people at YOUR DZ teach. it's good to keep things relativly consistant for students. I helped teach a coach course a few weeks ago, and for some reason the coach canidates do get very intimidated and nervous... remember, it's just like jumping..relax.. you.. know this stuff, your instructors are just trying to point out some things that might happen w/ students.. almost never till everything go 100% as planned. learn to expect the unexpected and then still be posative and encouraging for your student.
Personally, I teach... to teach.. What, Why, & How
Overall what you are going to learn.. ie fall rate.
Why you are learning it.. ie. because not all skydivers fall at the same rate and explain why.
then How you vary your fall rate.