With children, parental involvement is the best insurance of success. If a child knows the parent is interested in what he does, he is more willing to shoulder daily responsibilities. I will be happy to pass on to you tricks other parents have used to encourage practice on a daily basis or to spark input from other family members. Teaching must be matched to the student's learning style, not learning matched to the teacher's teaching style. Therefore, teaching style, curriculum, and approach must be flexible, varied, and individual.
Empowerment is the key to motivation.
The teacher's part is to introduce possibilities. I'll never be angry if you ask a question. I'll never be angry if you make a mistake. I'll be upset only if you don't try. If you won't try, I can't teach you.