Adult learners

I once had an adult piano student who went from zero to grade 3 and Alfred adult piano book level 3. She has unfortunately stopped learning when she moved to another town for work. The other adults who came my way did not go past Alfred Book 1. Now I am left with just one adult student, whom I hope will have the will to go as far as she could.

Here's an article about adults taking up musical instrument.
http://www.bbc.com/culture/story/20140709-never-too-late-to-learn?ocid=ww.social.link.email