Basic Folk Guitar
The first thing is not to frustrate or bore the student. I think students want to come away from each session with a new set of chords that go with a familiar song they've always known, like "Clementine" Make a list of what you want to cover in 10 sessions, ie. How to tune, what is a chord, types of strums, timing 4/4, 3/4, etc., Major/minor keys. Each one of these things is introduced in a session in relationship to a few songs.
For instance; in one lession teach the I,IV and V chords in D. Teach a basic scratch picking and use it for "The Banks of the Ohio" Give out a lession sheet each time with the Strum described, the chord diagrams and the words to 2-3 songs with the chords over the words.
Each session do a quick review of the previous lesson (everyone plays and sings).
At the end of 10 sessions, most will know the fingering for the chords in 5/6 keys (D, C, G, E, Em, Am) and they'll also be able to play 15 - 20 songs
That's the way it was done by a guy I knew back in the 60s