Can a Child Who’s Not Hyperactive Have ADHD?

Yes. Kids who have trouble focusing but are not unusually restless or impulsive have a more inattentive type ADHD. They tend to be diagnosed later because they are less prone to disruptive or problematic behavior that comes to the attention of teachers and parents. But kids who have inattentive symptoms may start to struggle in the middle of elementary school, when it becomes increasingly difficult for them to keep up.