Teaching online is a new way to teach that has no boundaries.

http://www.progressforamerica.org/2014/05/08/21st-century-music-learn-teach-guitar-online/

New way to teach new way to learn.
http://www.amazon.com/Teaching-Music-Twenty-First-Century-Edition/dp/0130280275

Unique in both content and approach, this book offers a single-volume authoritative comparison of the four most popular music education methods used in North America-Jacques-Dalcroze, Kodály, Orff, and Comprehensive Musicianship. Its in-depth examination of the methods and underlying philosophies of each method--and its suggested lessons for each method at each grade level

After having to write a music curriculum plan for a high school that had to meet all the standards set for schools by Arizona it was easy to see how learning music and art were connected to other subject such as math, science and cognitive development in general. Here is a link to more about this.

http://www.pbs.org/parents/education/music-arts/the-benefits-of-music-education/

This can be a good selling point to parents for music lessons and also to hold parents accountable for their children practicing their instruments and the importance of art and music as well.