I think your method tries too hard to do all things. It fails in my opinion in considering the time that it takes, and is no better than anything else out there. In my opinion, you write a book or do something, because you "do it better" and you have something "different" to offer.
In my opinion, your method is flawed on a number of counts. One, for the beginner it does what many books have done and in my opinion, incorrectly, or in a way that has had a detrimental effect on the student.
The number one priority of the teacher when starting out with a student on the guitar should be, in my opinion, (and I have taught well over 500 students in the last 7-8 years, not including the hundreds of online students I now teach and mentor around the world) should be to get them to fall in love with the guitar, and keep playing it. Experience has taught me that this can only be done with little victories. They need a payoff quickly or they can get bored, discouraged, feel that theres more work, pain and too little payoff. Books fail to recognize that learning the guitar has a steep learning curve, and so they jam what they think is teaching, into their methods, when it's little more than "information". I do believe your efforts are sincere, and it's clear that you've taken the time to try and do a good job. I just think that we start off at the wrong place.
I'll give you an example. Take chords, for example. The chords that you introduce and many do, are 3 finger chords.
Well, if they don't know about fret placement, intonation, blocking of strings and fingers, and such they may become very frustrated. However if your first chord, is say, a D sus2, and then you follow that with a G6 and then an Em, and a Cadd9, and an Am7 etc, you quickly help that student isolate their fingers to only 2, that are giving him problems.
Also, you can teach transitions quite easily, and just as important to learning how to play a chord, is how to change it to another chord that will likely connect to it, ala D to G. Since D sus 2 and G6 are 2 fingered variants of these chords, it allows them to get their 2 most important core fingers set and strengthened over a short time, where when they add that 3rd finger later, they have the first two solid like tree trunks. Plus they are already in the habit of transitioning.
This also means that early on you can teach them songs using two finger chords, and give them practice transitioning.
For example, Sweet Child of Mine uses D sus2 Cadd9 and G6, and is quite recognizable to the beginner, while not the exact chords. Cant you see is a Dsus2 - D/C and G, but it can be made into a D sus2 Cadd9 and G6 very easily. Brown eyed girl can be played with all 4 chords, G6 Cadd9 Dsus2 and Em, all 2 finger chords.
Thus, when friends and family ask the student to play a song, they can do so, and at the same time they are strengthening their finger placement, sense of rhythm, transitioning, and progressing faster. One of the fatal flaws about the traditional method of learning guitar is the enormous failure rate. I belong to NAMM and the industry stats are, for every 100 that begin a music book, 87 of them never make it to the end. That's a 13% chance of success. Sure some, will make it, but if the idea is to teach as many people as possible and reach them with the message, then we have to do more than convey information, we have to teach from their shoes, in ways that are relevant to the student, and which acknowledge the need for buy-in and small victories for the student as they learn.
Otherwise, we are just fooling ourselves that we are making a difference.
Just so that people understand, that I am speaking from experience and this works, I do this every day all day. My record of success among online students to date is 100 percent, which means that of all the students that have ever enrolled, 100 percent of them have stayed and are currently active. Our level of withdrawal from the Guitar Academy in person is less than 2 a year, out of over 100 enrolled, usually due to moves, grades, or graduation.
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