the rest of it is that he is in his own world which is far more interesting. So I think that's probably ADHD inattentive.
FWIW, my ds was off-task quite a bit when he wasn't getting appropriate instruction in writing (his big challenge). When he was older he was able to explain to me that what was happening was - he was completely lost and had no idea what to do on writing assignments, so he just eventually zoned out and started thinking about other things so he'd have *something* to do. It looked like inattentiveness due to ADHD but it was inattentiveness due to being completely lost and not understanding his assignment he was supposed to be working on. I wonder if part (or all) of what looks ADHD-ish with your ds might be that he's slipping off into his own world simply because it's more comfortable than sitting in his class not understanding directions. JMO, but I'd want to know more about the potential sequencing issues before I concluded it was ADHD.
polarbear
ps - when my dd was observed, his peers were also 100% on task. Except for the one bizarre writing exercise where my ds was said to be completely on-task. In that instance his classroom peers were apparently bouncing off the walls. Having spent a lot of time in his classroom, I can assure you his peers were indeed, bouncing off the walls most of the time
And the writing assignment ds was able to focus on.... happened after he'd spent an hour 1 on 1 with the school psych engaging in a guided pre-writing exercise.
