Everyone reaches those points where you stop progression for months or even longer...

The only trick is to keep hanging in there...

My daughter is playing both piano style and arranger style on a 76 key arranger... while playign arranger yields results faster and keeps her having fun in music, playing piano could be more rewarding in the long run...

Great comments and tips. Actually this is my boy's 3rd time taking lessons. The previous two is kind of stop'n go, whatever-comes thing and I did not paid attention. But this time i'll try my best to get him achieve decent playing skills. I'm looking forward on the day that he can actually play with me.
Jim

Some useful(?)tips here:
http://www.content4reprint.com/music/how-to-find-a-good-piano-teacher.htm

Taike