Here's an email you can use as a template to effectively inform piano parents of their child's progress (regularly).
31 Reasons Why Music Is Important- Music Advocacy Bulletin Board- Similar to an Advent Calendar, every day in March (Music in our Schools Month) a new reason of why music is important is revealed.
benefits of music education
There's always time for piano - and there's especially time for FUN piano practice activities. Find them here http://www.teachpianotoday.com/Piano-Practice-Exercises/
10 things every parent should know about starting- and keeping- their kids in music lessons, straight from a music teacher