The problem may be that the children are bored, discouraged, restless, and unable to follow instructions at school because they don't find the structure or challenge in school appropriate for them, according to Pruitt. He recommends that careful evaluation of children with school problems should include assessments of possible learning disabilities or other emotional or neurological disorders, such as depression or Tourette's syndrome. He says the least common type of ADHD is the hyperactivity subset. Children with hyperactivity tend to blurt out answers in the classroom but are able to concentrate on their tasks. They also may have difficulty sitting through a structured activity.
Hyperactive children are predominantly fidgety.
Some are impulsive to the point of being dangers to themselves. Others can be aggressive with their classmates. Children with the inattention subset are easily distracted in class and are disorganized, but not hyperactive. They daydream, forget or lose things, procrastinate with their assignments, and fail to complete their work. Some have difficulty paying attention for more than a few minutes.