No experience with STMath, but based on watching what others in DS's classes have been doing in maths and at what he's been doing, I wouldn't worry about doing maths without writing being a problem for a year or two, even if he is or becomes very ahead. Maths for age-typical children this age very seldom involves a creative step that they record. I'd make sure your DS can write the digits, and occasionally note whether or not he's consistently writing them the correct way round (it's normal if he's not now!), but beyond that, I'd say do what otherwise seems best, and think again when he turns 7.
ETA: solving problems and being able to explain how he did it, e.g. to you, is also great - doesn't really matter whether he writes it down.
Last edited by ColinsMum; 09/29/11 07:05 AM.
