In my practice sheets, I have a section for
a "polish piece."
I wanted to go into more detail of what that means and what
I consider a polished piece.
A polished piece is:
musical: dynamics, phrasing, etc.
memorized
played correctly: notes, rhythms, etc. (duh!)
I want my students to have a handful of solid pieces at all times.
They have to be able to play a song memorized and to start at any
point that I pick. :)
I try to make it fun, but they can't pass off a song until
it passes my "polished" standards.
Occasionally I will have a student that is stuck on a piece for a very long time.
Not able to memorize it or play it very well.
This is frustrating for me and my student who wants to learn new things too.
Be patient with them, but I think there comes a time when
it is OK to move on.
We often come back to old pieces in a few months with renewed perspective and
then my once struggling student can play it!
For younger students, rewards and fun games tend to help with motivation.
Parents can help as well.