That is why teachers, in the public school system, go to school to learn how to teach before they are turned loose on our children.
To help with your curriculum I suggest getting one of the "how to play" books and let the chapters guide you. Most of the books I've had do follow a structure that you could use. How to hold it, tune it, etc needs to come in there somewhere before how to play it. Which comes next, scales or chord tones, kinda depends on you and the student, what does the student need next?
Might pick up some hints from this; http://www.infed.org/thinkers/et-knowl.htm
Focus of this paper is kids get lectured to and drills are important. Adults like to have some say in what they are taught. Probably a combination of the two methods should/could have value. Little more on the subject; http://www.lifecircles-inc.com/Learn...es/knowls.html
I used to teach adults, no, not music.
The best music teacher I ever had gave me three things to work on each week. Understand we had already gotten the fundamentals down and were now working on taking the fundamentals into songs.
1) I started the lesson playing last weeks song for him. He then gave me suggestions on what more I needed to do with this song. If I had the song down I then got a new song and the old song went into my gig book.
2) A new song was given in sheet music form. Normally fake chord perhaps lead sheet. Plus a short theory paper dealing with things specific to this new song.
3) If I still needed to work on last weeks song I received suggestions on what I should concentrate on this week. Great thing about this is John had all of this written out and presented to me on paper, before I left, so there was no question about what I was to do once I got home. That one thing set John's lessons apart from the other instructors I've had.