Parents often notice that their child can not concentrate on the one thing for a long time. Child may become just forgetful or increase his motor activity. Usually this behavior is typical for preschool and school-age children and is harmless. However, these symptoms may be a sign of attention deficit hyperactivity disorder (ADHD), and they should be treated at an early stage. Otherwise, it can affect many aspects of learning and life in the future. Absent–mindedness - is a reduced ability to perform purposeful activities. In simple words, absent-mindedness is understood as a violation of concentration. The disorder is manifested by forgetfulness and inattention. This may be an individual personality trait, a symptom of an illness or a temporary state of fatigue. "According to my survey at school, only 31% of students answered that they are diligent and attentive. The rest said they were distracted by their parents, younger siblings, pets, talking on the phone and the loud sound of the