Teachers usually make these observations by comparing one child’s behavior and performance at school against the group of peers and what they are able to do. The teacher is likely signaling that he’s struggling in some areas, or behind in some areas. ADHD is a lot more than just inattention.
Ultimately, the only way to know what’s going on is to have an evaluation. I’d start with asking the school behavior specialist to observe him in the classroom several times and at different parts of the day to see if she feels an evaluation is in order.
Here’s the complete run-down of what it takes to meet the criteria for a diagnosis of ADHD:
ADDitude Community Moderator, Author & Mentor on Parenting ADHD, Mom to teen w/ ADHD, LDs, and autism