I created this method to teach basic I, V, IV harmony using the guitar as the "hands on" active approach. This method uses pictures of hands for the first few chords so students can see what their hand is supposed to look like and what it should look like if they are helping a partner. Children really don't understand the classic guitar icons found in most books. After a few weeks, they will make that association after seeing the hand pictures.
The chords are logical and new keys are introduced from chords already used. New chords are "found" by touch by having one finger as the anchor. The teacher should encourage the students to "feel" the chords as soon as possible. Reassure them that mistakes are all right, but, they will never learn to play if they are always looking at their fingers.
This method was refined for the course of several years and several hundred students.