My son is 8 yrs old, turning 9 in August...his teacher told me she thinks he needs to b tested for ADHD, bcuz he continuously disrupts her teaching, wont stay in his seat and rocks it back and forth and is just...basically, not interested in whats going on in class at times. He does those things at home as well, but is very capable of being still when told to be here at home, especially if put in time out. He is very smart, reads very well, he just has trouble focusing and concentrating on important things. Is it necessary to have him tested for ADHD?