I was waiting to go in for my lesson last summer. My teacher came out of the studio with a little boy, perhaps 6.
She told the mother, "I don't know if he practiced at all, but -- if so -- he did not practice anything I asked him to play." Then she said, "we had a half-hour lesson to complete, so I played a game with him where he has to guess or find certain notes. He seemed to enjoy it."
I admired the teacher's strategy here. She was very pleasant, and did not seem greatly perturbed by the young student, but I respected her in that she told the mother exactly where things were with her son. I can only imagine this is not what the mother wanted to hear.
A couple of things: Possibly this boy was a little too young -- sometimes for very young children, Suzuki piano works better. Children too young to read words may not be ready for traditional piano pedagogy (i.e., reading notes).
Second, two extremes of parenting regarding piano would be (1) scolding, harping parents on one hand, and (2) total "hands off" on the other. This mom might be in the second category. It appears the mother would really have to insist that the boy make at least some effort to attempt the material for the next lesson. Otherwise, what are either she or her son getting out of this?
I'm sorry to say I am not a piano teacher, but many of you are. I am sure that those of you who teach children run into this sort of conundrum every once and a while. If nothing is attempted at home, even minimum effort, how can the student move forward?