ps - I just thought of a few more things you could ask your ds' teachers about. Sometimes seizures have triggers - flashing lights are one example, can't think of any others right now, but the idea is that a specific type of trigger might be tied to seizures in an individual, so when you have a child with a history of seizures you try to ferret out what might trigger them. You could ask his teachers when the episodes happened that look like seizures, what he was doing or what was going on in the classroom etc when they happened. With seizures, if you kept a diary over time, you might see some common threads.
Another thing you can ask his teachers is what specifically does he look like during the zoning out - is he staring straight ahead, is he still, does he lick his lower lip (odd question... our neurologist asked that!), any kind of detail. Also ask how he behaves after - it sounds like he goes straight back into his work without anything appearing to have impacted him, but he ever appears to seem tired, or confused, etc, have them let you know.
And last thing - I would have them ask him if what he was thinking or if he noticed that he seemed to blank out for a second. Our dd, by the time she was 8 years old, could give us a good description of how she felt immediately before her seizures - and she was having auras (seeing lights and tingly feelings in her legs and arms) that we might not have known about if we hadn't asked.
Best wishes,
polarbear
