My son with motor dyspraxia is definitely inconsistent. People thought he had to be lazy when they saw he could do something easily one day and have difficulty the next, especially in things like piano, handwriting and dancing.

It is difficult for my son to work on something like piano all week and then not do as well as he did the week before when he didn't practice at all but the teacher thought he did because he did so well. This is very frustrating for him.