Honestly, he sound normal!
My DD would walk around the classroom (DURING CLASS) in first grade. She was bored silly. She read books and zoned out all the time. School was tremendously easy. She didn't need to study. She didn't need to pay attention. She would get straight A's in her sleep. She was terribly disorganized.
Now accelerated and age 10 in 6th, guess what? Overnight she is organized. She pays attention. She has "woken" up. She is prepared and participative. Why? Because it got challenging. Perhaps your son is still at a point where it is all still too easy and doesn't merit his attention.
