I split it two ways, in reflection of my general philosophy on playing (which is a bit contradictory, but I try)
I dont bother with a regimented structure unless I believe the pupil needs that; thats how they learn best. Guitars a personal thing and I like to help people play it how they want to play it. So, I find out what sort of thing they're currently aiming to be able to do. First off, if they're going for a style I'm weak at ("I want to be like Tommy Emanuell!") then I send them along to someone who can. If I can teach them then I gear my lessons into two parts:
1: The theory and techniques they're going to need. The physical and musical vocabulary.
2: Learning songs they want to be able to play, selected in advance. Often I have to learn them first, but thats as much of the fun as anything.
I dont think that teaching should be entirely dogmatic, 'this is how you play'. Thats boring and I dont think helps a pupil find their way around the instrument in their own fashion or develop their own voice with it. There obviously has to be a degree of dogma though, in a 'want to play that? then you need to know this, this, this and this' way, and in basic decent technique that no style can (or should at least) escape.
I've found that because it forces you to get off your arse and learn things you otherwise wouldnt, I've learned a hell of a lot about guitar and music from this sort of teaching style. Quite probably more than my pupils :lol:
Also; people learn differently. Some need a clear deliniated structure, some need clever/cheesy memory aids, some find diagrams beneficial, some just need a verbal demstration, some can connect what they're seeing with a sound easily and mimic the motions without trouble, some need motions to be broken down minute detail by minute detail, some just need to hear, etc etc. Experiment with your explanations, descriptions and demostrations and find whats most effective with them.
And have perfect, holy, infinite patience :lol: You get frustrated or impatient, and so will they, and they'll never learn anything. The pedogogic value of keeping good humour is not to be underestimated!